msm: kgsl: Add adreno_is_a2xx() function

Add a helper function to catch all A2XX devices.

Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
diff --git a/drivers/gpu/msm/adreno.h b/drivers/gpu/msm/adreno.h
index 9d84e87..5b3d676 100644
--- a/drivers/gpu/msm/adreno.h
+++ b/drivers/gpu/msm/adreno.h
@@ -118,4 +118,10 @@
 		adreno_dev->gpurev == ADRENO_REV_A225);
 }
 
+static inline int adreno_is_a2xx(struct adreno_device *adreno_dev)
+{
+	return (adreno_dev->gpurev <= ADRENO_REV_A225);
+}
+
+
 #endif /*__ADRENO_H */