meta-intel: Add Inforce SYS940x BSP

The Inforce SYS940x-ECX Developer-Ready Reference Platform features:
o Intel Atom E6xx (0.6-1.6 GHz)
o Up to 1GB on-board DDR2
o Intel Platform Controller Hub EG20T
o VGA,LVDS
o HD Audio
o SD Card
o Dual SATA
o Mini-PCIe

http://www.inforcecomputing.com/SYS940X_ECX.html

Signed-off-by: Darren Hart <dvhart@linux.intel.com>

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+This README file contains information on building the meta-sys940x BSP
+layer, and booting the images contained in the /binary directory.
+Please see the corresponding sections below for details.
+
+The Inforce SYS940x platform consists of the Intel Atom E6xx
+processor, plus the Intel EG20T Platform Controller Hub (Tunnel Creek
++ Topcliff).
+
+It also supports the E6xx embedded on-chip graphics via the Intel
+Embedded Media and Graphics Driver (EMGD) 1.10 Driver.
+
+
+Dependencies
+============
+
+This layer depends on:
+
+  URI: git://git.openembedded.org/bitbake
+  branch: master
+
+  URI: git://git.openembedded.org/openembedded-core
+  layers: meta
+  branch: master
+
+  URI: git://git.yoctoproject.org/meta-intel
+  layers: intel
+  branch: master
+
+
+Patches
+=======
+
+Please submit any patches against this BSP to the Yocto mailing list
+(yocto@yoctoproject.org) and cc: the maintainer:
+
+Maintainer: Darren Hart <dvhart@linux.intel.com>
+
+Please see the meta-intel/MAINTAINERS file for more details.
+
+
+Table of Contents
+=================
+
+  I. Building the meta-sys940x BSP layer
+ II. Booting the images in /binary
+
+
+I. Building the meta-sys940x BSP layer
+===================================
+
+In order to build an image with BSP support for a given release, you
+need to download the corresponding BSP tarball from the 'Board Support
+Package (BSP) Downloads' page of the Yocto Project website.
+
+Having done that, and assuming you extracted the BSP tarball contents
+at the top-level of your yocto build tree, you can build an sys940x image
+by adding the location of the meta-sys940x layer to bblayers.conf, along
+with the meta-intel layer itself (to access common metadata shared
+between BSPs) e.g.:
+
+  yocto/meta-intel \
+  yocto/meta-intel/meta-sys940x \
+
+The meta-sys940x layer contains support for two different machine
+configurations. These configurations are identical except for the fact
+that the one prefixed with 'sys940x' makes use of the Intel-proprietary
+EMGD 1.10 graphics driver, while the one prefixed with 'sys940x-noemgd'
+does not.
+
+If you want to enable the layer that supports EMGD graphics add the
+following to the local.conf file:
+
+  MACHINE ?= "sys940x"
+
+The 'sys940x' machine includes the emgd-driver-bin package, which has a
+proprietary license that must be whitelisted by adding the string
+"license_emgd-driver-bin_1.10" to the LICENSE_FLAGS_WHITELIST variable
+in your local.conf.  For example:
+
+  LICENSE_FLAGS_WHITELIST = "license_emgd-driver-bin_1.10"
+
+If you want to enable the layer that does not support EMGD graphics
+add the following to the local.conf file:
+
+  MACHINE ?= "sys940x-noemgd"
+
+You should then be able to build an sys940x image as such:
+
+  $ source oe-init-build-env
+  $ bitbake core-image-sato
+
+At the end of a successful build, you should have a live image that
+you can boot from a USB flash drive (see instructions on how to do
+that below, in the section 'Booting the images from /binary').
+
+As an alternative to downloading the BSP tarball, you can also work
+directly from the meta-intel git repository.  For each BSP in the
+'meta-intel' repository, there are multiple branches, one
+corresponding to each major release starting with 'laverne' (0.90), in
+addition to the latest code which tracks the current master (note that
+not all BSPs are present in every release).  Instead of extracting a
+BSP tarball at the top level of your yocto build tree, you can
+equivalently check out the appropriate branch from the meta-intel
+repository at the same location.
+
+
+II. Booting the images in /binary
+=================================
+
+This BSP contains bootable live images, which can be used to directly
+boot Yocto off of a USB flash drive.
+
+Under Linux, insert a USB flash drive.  Assuming the USB flash drive
+takes device /dev/sdf, use dd to copy the live image to it.  For
+example:
+
+# dd if=core-image-sato-sys940x-20101207053738.hddimg of=/dev/sdf
+# sync
+# eject /dev/sdf
+
+This should give you a bootable USB flash device.  Insert the device
+into a bootable USB socket on the target, and power on.  This should
+result in a system booted to the Sato graphical desktop.
+
+If you want a terminal, use the arrows at the top of the UI to move to
+different pages of available applications, one of which is named
+'Terminal'.  Clicking that should give you a root terminal.
+
+If you want to ssh into the system, you can use the root terminal to
+ifconfig the IP address and use that to ssh in.  The root password is
+empty, so to log in type 'root' for the user name and hit 'Enter' at
+the Password prompt: and you should be in.
+
+----
+
+If you find you're getting corrupt images on the USB (it doesn't show
+the syslinux boot: prompt, or the boot: prompt contains strange
+characters), try doing this first:
+
+# dd if=/dev/zero of=/dev/sdf bs=1M count=512