Revert "configs: Add built-in mic to primary input sources"

This reverts commit 1c57390b961d2eaee6817d91e9453832780261bf.

As per surround sound recording design reverting this
commit to remove built-in mic from primary inputs.

Change-Id: Ic0727a4c59d437045a2ef38cfe4ca2ea66ae21d2
6 files changed