msm: kgsl: Enable protected mode for A3XX

Enable protected register mode for A3XX with these commits from
msm-3.10:

msm: kgsl: Enable protected register mode for A3XX
msm: kgsl: Print the register that causes a protected mode error
msm: kgsl: Unprotect the VBIF performance counters

Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>

Conflicts:
	drivers/gpu/msm/adreno.h
	drivers/gpu/msm/adreno_a3xx.c

Change-Id: Idfdc67e63422a4b55e59303c11ac8e376ab523e4