drm/msm/sde: add sde error prefix for all errors

Add sde error prefix for all sde driver errors.

Change-Id: I59d8b37338cb8641ebdea2c50b31b5e63946b49c
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>
diff --git a/drivers/gpu/drm/msm/sde/sde_kms.h b/drivers/gpu/drm/msm/sde/sde_kms.h
index eba430b..e66f9df 100644
--- a/drivers/gpu/drm/msm/sde/sde_kms.h
+++ b/drivers/gpu/drm/msm/sde/sde_kms.h
@@ -52,7 +52,7 @@
 			pr_debug(fmt, ##__VA_ARGS__);                      \
 	} while (0)
 
-#define SDE_ERROR(fmt, ...) pr_err(fmt, ##__VA_ARGS__)
+#define SDE_ERROR(fmt, ...) pr_err("[sde error]" fmt, ##__VA_ARGS__)
 
 #define POPULATE_RECT(rect, a, b, c, d, Q16_flag) \
 	do {						\