Revert "gpu: msm: Add regulator name for a200"

This reverts commit 9d38b8fc30acfb9093f0e28b2bdbcaa433189448

Change-Id: I12a12e6d824663f362e5f3c0b0ead8158246f31c
Merge "Revert "gpu: msm: Add regulator name for a200"" into next-3.4