feat(workflows): Add support for buildroot

- Add support for building buildroot for AM62X

Signed-off-by: Chirag Shilwant <[email protected]>

Author: cshilwant

.github/workflows/build.yml

@@ -48,6 +48,8 @@ jobs:
             device: AM62PX
           - os: android
             device: AM62X
+          - os: buildroot
+            device: AM62X
 
     steps:
       - name: Checkout