github: Enable arm64 again and consider armhf next

For some reason it was not buidling despite the tricks in helper script.

Signed-off-by: Philippe Coval <philippe.coval@silabs.com>

Author: rzr

.github/workflows/build-rootfs.yml

@@ -12,7 +12,9 @@ jobs:
     strategy:
       matrix:
         arch:
-          - amd64
+#         - amd64
+          - arm64
+#         - armhf
     steps:
       - uses: actions/checkout@v4.1.1
         with: