msm: kgsl: Add GPUCC register dumps to A6xx GPU snapshot

GPUCC registers are valid for all A6xx GPUs. Hence add
these register to A6xx snapshot dumping.

Change-Id: I6b8d1a856ed096afff7d22b4382ec6ac09b7b1fb
Signed-off-by: Hareesh Gundu <hareeshg@codeaurora.org>