meta-fishriver: new layer for Fish River Island (Z530/EG20T) systems

This layer provides support for Z530 + EG20T Intel systems.

Currently it supports only vesa graphics, which will be upgraded
shortly.

Signed-off-by: Tom Zanussi <tom.zanussi@intel.com>

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+This README file contains information on building the meta-fishriver
+BSP layer, and booting the images contained in the /binary directory.
+Please see the corresponding sections below for details.
+
+
+Table of Contents
+=================
+
+  I. Special notes on the meta-fishriver BSP layer
+ II. Building the meta-fishriver BSP layer
+III. Booting the images in /binary
+
+
+I. Special notes on the meta-fishriver BSP layer
+================================================
+
+The meta-fishriver layer currently and temporarily uses the crownbay
+kernel branch.  This will change once we have new patches and/or
+config changes for:
+
+- Zigbee
+- wifi
+- upstream gma500
+- EMGD?
+
+
+II. Building the meta-fishriver BSP layer
+=========================================
+
+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.
+
+In order to build an image with BSP support for a given release, you
+need to check out the 'meta-intel' branch corresponding to the release
+you're building against e.g. to build for laverne (0.90), check out
+the 'laverne' branch of both poky and 'meta-intel'.
+
+Having done that, and assuming you cloned the 'meta-intel' repository
+at the top-level of your yocto build tree, you can build a fishriver
+image by adding the location of the meta-fishriver layer to
+bblayers.conf e.g.:
+
+  yocto/meta-intel/meta-fishriver \
+
+To enable the fishriver layer, add the fishriver MACHINE to local.conf:
+
+  MACHINE ?= "fishriver"
+
+You should then be able to build a fishriver image as such:
+
+  $ source poky-init-build-env
+  $ bitbake poky-image-sato-live
+
+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').
+
+
+III. 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=poky-image-sato-live-fishriver-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