msm: kgsl: Invalidate TLB and SMMU caches after GPU Power collapse

When gpu goes to power collapse we do not detach SMMU
on 8996 because of retention feature. When GPU comes out
of power collapse invalidate TLB and SMMU caches to reset
SMMU state as per recommendation of hardware team.

Change-Id: I53a67cdc2aad255b4f99f1708aae405542435e0c
Signed-off-by: Tarun Karra <tkarra@codeaurora.org>