msm: kgsl: change readtimestamp from IOR to IOWR and keep legacy

Signed-off-by: Jason Varbedian <jasonv@codeaurora.org>
diff --git a/drivers/gpu/msm/kgsl.c b/drivers/gpu/msm/kgsl.c
index fef664b..ec9ff6b 100644
--- a/drivers/gpu/msm/kgsl.c
+++ b/drivers/gpu/msm/kgsl.c
@@ -1594,6 +1594,8 @@
 
 	if (cmd == IOCTL_KGSL_CMDSTREAM_FREEMEMONTIMESTAMP_OLD)
 		cmd = IOCTL_KGSL_CMDSTREAM_FREEMEMONTIMESTAMP;
+	else if (cmd == IOCTL_KGSL_CMDSTREAM_READTIMESTAMP_OLD)
+		cmd = IOCTL_KGSL_CMDSTREAM_READTIMESTAMP;
 
 	if (cmd & (IOC_IN | IOC_OUT)) {
 		if (_IOC_SIZE(cmd) < sizeof(ustack))