Revert "Add CM's GSM Support"

This reverts commit 4e9b5572c11b6ded20ebe5f137439aeb9b5bf749.
Revert "add mobile network support to overlay"

This reverts commit 7719cd8dcd6e2a424f412e25b5cae152a9e8ae4f.
Bring inline with TF101 source tree.