drm/omap: convert dss_mgr_connect to accept omap_channel

We are removing uses of 'struct omap_overlay_manager'. This patch
changes dss_mgr_connect() to accept 'enum omap_channel' instead of
'struct omap_overlay_manager'.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/gpu/drm/omapdrm/dss/sdi.c b/drivers/gpu/drm/omapdrm/dss/sdi.c
index 33d36ab..93077f7 100644
--- a/drivers/gpu/drm/omapdrm/dss/sdi.c
+++ b/drivers/gpu/drm/omapdrm/dss/sdi.c
@@ -291,7 +291,7 @@
 	if (!mgr)
 		return -ENODEV;
 
-	r = dss_mgr_connect(mgr, dssdev);
+	r = dss_mgr_connect(mgr->id, dssdev);
 	if (r)
 		return r;