Revert "msm8974: Remove dsp"

This reverts commit 7c20e7957e28b57b7a8b283a3407f2acc5248e8f.

Change-Id: I15cad7f05e8de54f1b0868dfc39f9ab36f452b9c
remove unused overlays and disable some for now

Change-Id: Ife1537abc490691a316af3e88139a2b035e18026
bacon: disable telphony overlay for now we do not support

Change-Id: I83354481381675c099a87d92e1c86b294fcbaf24