drm/msm/dsi-stagging: support 180 degree panel orientation caps

Add support for 180 degree panel orientation capability
on DSI drm component.

Change-Id: I76f7939fba63692c9fc626887d229b6252c74a63
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>
diff --git a/drivers/gpu/drm/msm/dsi-staging/dsi_drm.c b/drivers/gpu/drm/msm/dsi-staging/dsi_drm.c
index 53f0098..37ed411 100644
--- a/drivers/gpu/drm/msm/dsi-staging/dsi_drm.c
+++ b/drivers/gpu/drm/msm/dsi-staging/dsi_drm.c
@@ -357,6 +357,10 @@
 	case DSI_PANEL_ROTATE_V_FLIP:
 		sde_kms_info_add_keystr(info, "panel orientation", "vert flip");
 		break;
+	case DSI_PANEL_ROTATE_HV_FLIP:
+		sde_kms_info_add_keystr(info, "panel orientation",
+							"horz & vert flip");
+		break;
 	default:
 		pr_debug("invalid panel rotation:%d\n",
 						panel->phy_props.rotation);