msm: kgsl: Remove XPU protected registers from snapshot dump

Remove the XPU2 register block and certain registers from the
VBIF block since they are XPU protected. Accessing these registers
in snapshot causes XPU violations and device crashes.

CRs-Fixed: 705139
Change-Id: I31527479a029a908fcf85fdf0d16a1afa71fb3b0
Signed-off-by: Shrenuj Bansal <shrenujb@codeaurora.org>