msm: kgsl: Add VBIF register programming for A4XX

Add VBIF register programming for a420 core during start up of
this device.

Change-Id: I1bd79f72dabdc8c4e9403bb2788b3ea53d8ba04c
Signed-off-by: Shubhraprakash Das <sadas@codeaurora.org>
4 files changed