disp: msm: add allowed_mode_switch blob property

The change adds a new mode property allowed_mode_switch. The new
property is a 32bit bitmask that indicates the modes each mode
can switch to. This change is required to pass the driver mode
switching capabilities, so that user mode can reject any mode switch
that is not supported by the driver.

Change-Id: I76d1733a07a6d57487ba9f461055270d7e60e060
Signed-off-by: Satya Rama Aditya Pinapala <psraditya30@codeaurora.org>

msm/dsi/dsi_defs.h

@@ -597,6 +597,7 @@ struct dsi_host_config {
  * @pclk_scale:           pclk scale factor, target bpp to source bpp
  * @roi_caps:		  Panel ROI capabilities
  * @widebus_support       48 bit wide data bus is supported by hw
+ * @allowed_mode_switch: BIT mask to mark allowed mode switches
  */
 struct dsi_display_mode_priv_info {
 	struct dsi_panel_cmd_set cmd_sets[DSI_CMD_SET_MAX];
@@ -620,6 +621,7 @@ struct dsi_display_mode_priv_info {
 	struct msm_ratio pclk_scale;
 	struct msm_roi_caps roi_caps;
 	bool widebus_support;
+	u32 allowed_mode_switch;
 };
 
 /**