disp: msm: dsi: add qsync min fps val in dsi display mode priv info

In the current code for finding the qsync min fps for a
mode, entire mode list is iterated which involves acquiring
dsi display_lock. During conn tx debugfs commands, if
qsync min fps is required, we try to acquire dsi
display_lock twice which results in hang state. This change
adds qsync min fps value in dsi_display_mode_priv_info
struct in order to get the qsync fps from the
msm_display_mode present in connector state instead of
looping through all the modes to find the mode qsync fps.

Change-Id: Ifded40d1f12462bb50fc7bdafb746ae5b8d9512a
Signed-off-by: Yashwanth <yvulapu@codeaurora.org>

msm/sde/sde_encoder.c

@@ -1053,7 +1053,7 @@ static void _sde_encoder_get_qsync_fps_callback(struct drm_encoder *drm_enc,
 
 	sde_conn = to_sde_connector(sde_enc->cur_master->connector);
 	if (sde_conn->ops.get_qsync_min_fps)
-		rc = sde_conn->ops.get_qsync_min_fps(sde_conn->display, conn_state);
+		rc = sde_conn->ops.get_qsync_min_fps(conn_state);
 
 	if (rc < 0) {
 		SDE_ERROR("invalid qsync min fps %d\n", rc);