msm: kgsl: Use correct GBIF settings for A612 GPU

For A612, GBIF client QOS settings should be programmed using
RBBM_GBIF_CLIENT_QOS_CNTL instead of RBBM_VBIF_CLIENT_QOS_CNTL
which is valid only for A630 and A615 GPU family. Correct this
to make sure GBIF client QOS values are programmed correctly.

Change-Id: I91dcbb33d077ad5cae5a70810a93fdcc73fbe6f1
Signed-off-by: Deepak Kumar <dkumar@codeaurora.org>