msm: mdss: Enable assertive display backlight calibration

Allow for assertive display to set the backlight level in calibration mode.

Change-Id: I990c4a191410614bec2d615baaae1a2a34cc48e5
Signed-off-by: Carl Vanderlip <carlv@codeaurora.org>
diff --git a/include/linux/msm_mdp.h b/include/linux/msm_mdp.h
index 4d13a2f..1af2463 100644
--- a/include/linux/msm_mdp.h
+++ b/include/linux/msm_mdp.h
@@ -607,6 +607,7 @@
 #define MDSS_AD_MODE_AUTO_STR	0x1
 #define MDSS_AD_MODE_TARG_STR	0x3
 #define MDSS_AD_MODE_MAN_STR	0x7
+#define MDSS_AD_MODE_CALIB	0xF
 
 #define MDP_PP_AD_INIT	0x10
 #define MDP_PP_AD_CFG	0x20
@@ -663,6 +664,7 @@
 	union {
 		uint32_t amb_light;
 		uint32_t strength;
+		uint32_t calib_bl;
 	} in;
 	uint32_t output;
 };