msm: kgsl: Updated VBIF settings for A330 to improve performance

Changed values written to VBIF registers for A330.
The maximum pending request from clients is increased to 24.
Disable VBIF clock gating. This potentially increases stand-by power.

Change-Id: Ic9a4f15546f4122298e140e79e4572c82e6385fc
Signed-off-by: Lokesh Batra <lbatra@codeaurora.org>