msm: kgsl: Set correct values for SMMU protect register for A5xx

For programming the CP Protect register for SMMU in A5xx, pass
correct values for SMMU registers base offset and the count of
registers to be protected.

Change-Id: Idbc377d1a03ee3b6cd3060c6feeeb95e04e859e9
Signed-off-by: Archana Sriram <apsrir@codeaurora.org>