disp: msm: add support for seamless dsc switch

This change adds logic to determine dsc switch based on
the connector property "CONNECTOR_PROP_DSC_MODE" and
performs seamless DSC switch if there is any change in
DSC configuration. The connector property is populated
in msm_sub_mode based on which suitable mode is selected.

Change-Id: Ifc4931f16dfb814781bc1d72b103e09103e6bfee
Signed-off-by: Yashwanth <yvulapu@codeaurora.org>

msm/dp/dp_drm.c

@@ -377,6 +377,7 @@ end:
 
 int dp_connector_get_mode_info(struct drm_connector *connector,
 		const struct drm_display_mode *drm_mode,
+		struct msm_sub_mode *sub_mode,
 		struct msm_mode_info *mode_info,
 		void *display, const struct msm_resource_caps_info *avail_res)
 {