[Buildroot] Support for Atmel SAMA5D4 EK

[Gurumani, Swapna]

Hello,
I made modifications to sama5d3_defconfig to support atmel's sama5d4-EK Evaluation kit.
Here is a link to Atmel's buildroot github where youc an find sama5d3_defconfig:
https://github.com/linux4sam/buildroot-at91

Please find attached the defconfig file for sama5d4.
I am trying to follow instructions provided her to create a patch:
http://buildroot.uclibc.org/downloads/manual/manual.html#_contributing_to_buildroot

But this won't create a patch. Please let me know how to provide a patch. Basically when I type "git format-patch -M -n -s -o outgoing origin/master", nothing happens.
Regards
Swapna

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.busybox.net/pipermail/buildroot/attachments/20150312/868aa360/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: sama5d4_defconfig
Type: application/octet-stream
Size: 53230 bytes
Desc: sama5d4_defconfig
URL: <http://lists.busybox.net/pipermail/buildroot/attachments/20150312/868aa360/attachment.obj>