msm: kgsl: Let normal register functions access GMU

Update the kgsl register read and write functions to also access the
GMU register range with suitable range checking. This will simplify
common code that accesses both GMU and non-GMU registers.

Change-Id: Iea02c721b4cf6cdbc42ecdd72a490cca34a261ee
Signed-off-by: Lynus Vaz <lvaz@codeaurora.org>
diff --git a/drivers/gpu/msm/adreno_ringbuffer.c b/drivers/gpu/msm/adreno_ringbuffer.c
index 9d847ae..bff1fda 100644
--- a/drivers/gpu/msm/adreno_ringbuffer.c
+++ b/drivers/gpu/msm/adreno_ringbuffer.c
@@ -54,21 +54,10 @@
 
 	/* Read always on registers */
 	if (!adreno_is_a3xx(adreno_dev)) {
-		if (kgsl_gmu_isenabled(KGSL_DEVICE(adreno_dev))) {
-			uint32_t val_lo, val_hi;
-
-			adreno_read_gmureg(adreno_dev,
-				ADRENO_REG_RBBM_ALWAYSON_COUNTER_LO, &val_lo);
-			adreno_read_gmureg(adreno_dev,
-				ADRENO_REG_RBBM_ALWAYSON_COUNTER_HI, &val_hi);
-
-			time->ticks = (val_lo | ((uint64_t)val_hi << 32));
-		} else {
-			adreno_readreg64(adreno_dev,
-				ADRENO_REG_RBBM_ALWAYSON_COUNTER_LO,
-				ADRENO_REG_RBBM_ALWAYSON_COUNTER_HI,
-				&time->ticks);
-		}
+		adreno_readreg64(adreno_dev,
+			ADRENO_REG_RBBM_ALWAYSON_COUNTER_LO,
+			ADRENO_REG_RBBM_ALWAYSON_COUNTER_HI,
+			&time->ticks);
 
 		/* Mask hi bits as they may be incorrect on some targets */
 		if (ADRENO_GPUREV(adreno_dev) >= 400 &&