msm: kgsl: Correct a650 LLC configuration

There has been no change in the way we configure the LLC slices
for a650 gpu as we did for a640 gpu. So make the code consistent.

Change-Id: If71b41a769bc15bd625d44e5495b2d86f31493e4
Signed-off-by: Harshdeep Dhatt <hdhatt@codeaurora.org>