disp: msm: sde: install retire fence offset property

Add changes to install retire fence offset property
and this configurable offset property can be used
to create speculative retire fences.

Change-Id: I0b5bf9bab5bfb811ddbc7a3e8813a3e801272d41
Signed-off-by: Jayaprakash Madisetty <jmadiset@codeaurora.org>

msm/msm_drv.h

@@ -202,6 +202,7 @@ enum msm_mdp_conn_property {
 	/* range properties */
 	CONNECTOR_PROP_OUT_FB = CONNECTOR_PROP_BLOBCOUNT,
 	CONNECTOR_PROP_RETIRE_FENCE,
+	CONN_PROP_RETIRE_FENCE_OFFSET,
 	CONNECTOR_PROP_DST_X,
 	CONNECTOR_PROP_DST_Y,
 	CONNECTOR_PROP_DST_W,