msm: kgsl: add a kgsl_readtimestamp() wrapper

Calling this device function directly from the function
table is unnecessarily verbose, and done fairly often.

Change-Id: Ib9d75b31dfab8fb4ccced46fe62a08a98da8c94f
Signed-off-by: Jeremy Gebben <jgebben@codeaurora.org>
diff --git a/drivers/gpu/msm/kgsl_snapshot.c b/drivers/gpu/msm/kgsl_snapshot.c
index f61c74f..080cb15 100644
--- a/drivers/gpu/msm/kgsl_snapshot.c
+++ b/drivers/gpu/msm/kgsl_snapshot.c
@@ -63,10 +63,10 @@
 	 * return the global timestamp for all contexts
 	 */
 
-	header->timestamp_queued = device->ftbl->readtimestamp(device,
-		context, KGSL_TIMESTAMP_QUEUED);
-	header->timestamp_retired = device->ftbl->readtimestamp(device,
-		context, KGSL_TIMESTAMP_RETIRED);
+	header->timestamp_queued = kgsl_readtimestamp(device, context,
+						      KGSL_TIMESTAMP_QUEUED);
+	header->timestamp_retired = kgsl_readtimestamp(device, context,
+						       KGSL_TIMESTAMP_RETIRED);
 
 	_ctxtptr += sizeof(struct kgsl_snapshot_linux_context);