README: Clarify/standardise contributions process

Now we have a contributor guide combining various wiki pages, point at
that and standarise our approach across layers.

(From meta-yocto rev: 000bc83cf581aeb47798a5a30299bb0d5c767984)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta-poky/README.poky.md

@@ -34,19 +34,8 @@ For information about OpenEmbedded, see the
 Contribution Guidelines
 -----------------------
 
-The project works using a mailing list patch submission process. Patches
-should be sent to the mailing list for the repository the components
-originate from (see below). Throughout the Yocto Project, the README
-files in the component in question should detail where to send patches,
-who the maintainers are and where bugs should be reported.
-
-A guide to submitting patches to OpenEmbedded is available at:
-
-<https://www.openembedded.org/wiki/How_to_submit_a_patch_to_OpenEmbedded>
-
-There is good documentation on how to write/format patches at:
-
-<https://www.openembedded.org/wiki/Commit_Patch_Message_Guidelines>
+Please refer to our contributor guide here: https://docs.yoctoproject.org/dev/contributor-guide/
+for full details on how to submit changes.
 
 Where to Send Patches
 ---------------------

meta-yocto-bsp/README.hardware.md

@@ -33,10 +33,19 @@ The following boards are supported by the meta-yocto-bsp layer:
 For more information see the board's section below. The appropriate MACHINE
 variable value corresponding to the board is given in brackets.
 
-Reference Board Maintenance
-===========================
+Reference Board Maintenance and Contributions
+=============================================
+
+Please refer to our contributor guide here: https://docs.yoctoproject.org/dev/contributor-guide/
+for full details on how to submit changes.
+
+As a quick guide, patches should be sent to poky@lists.yoctoproject.org
+The git command to do that would be:
+ 
+     git send-email -M -1 --to poky@lists.yoctoproject.org
 
-Send pull requests, patches, comments or questions about meta-yocto-bsps to poky@lists.yoctoproject.org
+Send pull requests, patches, comments or questions about meta-yocto-bsp to 
+poky@lists.yoctoproject.org
 
 Maintainers: Kevin Hao <kexin.hao@windriver.com>
              Bruce Ashfield <bruce.ashfield@gmail.com>