meta-xilinx: Clean up vendor specific machine configuration files

1. Add new metal-xilinx-vendor layer which supports vendor specific
   machine configuration files, device-tree, kernel, platform-init etc.
2. Moved below vendor machine conf files, dt and related configs from
   meta-xilinx-bsp and meta-xilinx-contrib to meta-xilinx-vendor layer.
    - microzed-zynq7.conf
    - minized-zynq7.conf
    - picozed-zynq7.conf
    - zedboard-zynq7.conf
    - zybo-zynq7.conf
    - zybo-linux-bd-zynq7.conf
    - ultra96-zynqmp.conf
3. Obsolete qemu-zynq7, s3adsp1800-qemu-microblazeeb, v350-versal and
   vc-p-a2197-00-versal from meta-xilinx-bsp layer. Users should use
   zynq-generic.conf for zynq7000 qemu boot should be functionally
   equivalent to qemu-zynq7.
4. Add new MAINTAINERS.md file and move maintainers, Mailing list and
   Patches content from meta-xilinx-* README.md to MAINTAINERS.md file.
5. Updated README.md file for supported board machines files in
   meta-xilinx-bsp, meta-xilinx-contrib and meta-xilinx-vendor layers.
6. Disabled old drm kernel patches for zybo-linux-bd-zynq mahcine in
   meta-xilinx-contrib layer as these patches doesn't apply on 5.x
   kernel, if we don't hear from patch submitter we will remove these
   patches from meta-xilinx-contrib layer.
7. Removed drm kernel cache metadate for zybo-linux-bd-zynq7 machine
   as these configs are already available in xilinx_zynq_defconfig.
8. Fixed build issue for u-boot by changing
   PREFERRED_PROVIDER_virtual/bootloader from u-boot to u-boot-xlnx.
9. Add meta-xilinx-vendor to bblayers.conf.sample

Signed-off-by: Sandeep Gundlupet Raju <sandeep.gundlupet-raju@xilinx.com>
Signed-off-by: Mark Hatle <mhatle@xilinx.com>

2 files changed, 8 insertions, 23 deletions

diff --git a/meta-xilinx-core/README.md b/meta-xilinx-core/README.md
index 8997760c..d450c4b3 100644
--- a/meta-xilinx-core/README.md
+++ b/meta-xilinx-core/README.md
@@ -1,24 +1,8 @@
-meta-xilinx-core
-================
+# meta-xilinx-core
 
-This layer provides support for MicroBlaze, Zynq and ZynqMP.
+This layer provides support for MicroBlaze, Zynq, ZynqMP and Versal architectures.
 
-
-Maintainers, Mailing list, Patches
-==================================
-
-Please send any patches, pull requests, comments or questions for this layer to
-the [meta-xilinx mailing list](https://lists.yoctoproject.org/listinfo/meta-xilinx):
-
-        meta-xilinx@lists.yoctoproject.org
-
-Maintainers:
-
-        Sai Hari Chandana Kalluri <chandana.kalluri@xilinx.com>
-        Mark Hatle <mark.hatle@xilinx.com>
-
-Dependencies
-============
+## Dependencies
 
 This layer depends on:
 
@@ -26,9 +10,10 @@ This layer depends on:
 
         URI: git://git.openembedded.org/openembedded-core
         layers: meta
+        branch: master or xilinx current release version (e.g. hosister)
+
 
-Configuring Machines
-====================
+## Configuring Machines
 
 All machines that use meta-xilinx-tools should be derived from one of the
 following: microblaze-generic, zynq-generic, zynqmp-generic, or 
@@ -58,8 +43,7 @@ require you to specify the path to a PDI file using PDI_PATH.  The XSCT
 version will extract the PDI automatically.
 
 
-Recipe Licenses
-===============
+## Recipe Licenses
 
 Due to licensing restrictions some recipes in this layer rely on closed source
 or restricted content provided by Xilinx. In order to use these recipes you must
diff --git a/meta-xilinx-core/conf/bblayers.conf.sample b/meta-xilinx-core/conf/bblayers.conf.sample
index 890ef3b6..a98e8936 100644
--- a/meta-xilinx-core/conf/bblayers.conf.sample
+++ b/meta-xilinx-core/conf/bblayers.conf.sample
@@ -23,6 +23,7 @@ BBLAYERS ?= " \
     ##OEROOT##/../meta-xilinx/meta-xilinx-pynq \
     ##OEROOT##/../meta-xilinx/meta-xilinx-standalone \
     ##OEROOT##/../meta-xilinx/meta-xilinx-contrib \
+    ##OEROOT##/../meta-xilinx/meta-xilinx-vendor \
     ##OEROOT##/../meta-xilinx-tools \
     ##OEROOT##/../meta-petalinux \
     ##OEROOT##/../meta-virtualization \