msm: mdss: Initial calibration mode implementation

Enable calibration mode to be set via framebuffer ioctl.

Change-Id: I50e7f652b23180553e1706975e7cbffce68ddf55
Signed-off-by: Carl Vanderlip <carlv@codeaurora.org>
diff --git a/include/linux/msm_mdp.h b/include/linux/msm_mdp.h
index 6d41c13..4d13a2f 100644
--- a/include/linux/msm_mdp.h
+++ b/include/linux/msm_mdp.h
@@ -667,6 +667,7 @@
 	uint32_t output;
 };
 
+#define MDSS_CALIB_MODE_BL	0x1
 struct mdss_calib_cfg {
 	uint32_t ops;
 	uint32_t calib_mask;