qcom-common: proper eri overlay

Change-Id: Ifd3930a68625497ceb660a3aeba1fab43cbc26eb
(cherry picked from commit c9fae921e7655a45518021992e2085f821d07abe)
overlay: add r970-specific eri overlays

Change-Id: I6705b9f280ea9c8099b72ad7addb000fc1e4db2f