OMAPDSS: DISPC: add dispc_mgr_get_sync_lost_irq()

Add function that returns the sync lost irq mask for the given channel.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/omap2/dss/dispc.c

@@ -542,6 +542,11 @@ u32 dispc_mgr_get_framedone_irq(enum omap_channel channel)
 	return mgr_desc[channel].framedone_irq;
 }
 
+u32 dispc_mgr_get_sync_lost_irq(enum omap_channel channel)
+{
+	return mgr_desc[channel].sync_lost_irq;
+}
+
 u32 dispc_wb_get_framedone_irq(void)
 {
 	return DISPC_IRQ_FRAMEDONEWB;

drivers/video/omap2/dss/dss.h

@@ -434,6 +434,7 @@ void dispc_ovl_set_channel_out(enum omap_plane plane,
 
 u32 dispc_mgr_get_vsync_irq(enum omap_channel channel);
 u32 dispc_mgr_get_framedone_irq(enum omap_channel channel);
+u32 dispc_mgr_get_sync_lost_irq(enum omap_channel channel);
 bool dispc_mgr_go_busy(enum omap_channel channel);
 void dispc_mgr_go(enum omap_channel channel);
 bool dispc_mgr_is_enabled(enum omap_channel channel);