OMAP: DSS2: move set/get_update_mode()

Move set/get_update_mode() from omap_dss_device to omap_dss_driver.

This is part of a larger patch-set, which moves the control from omapdss
driver to the display driver.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
diff --git a/drivers/video/omap2/dss/manager.c b/drivers/video/omap2/dss/manager.c
index 4ede519..913142d 100644
--- a/drivers/video/omap2/dss/manager.c
+++ b/drivers/video/omap2/dss/manager.c
@@ -522,17 +522,18 @@
 	u32 irq;
 	int r;
 	int i;
+	struct omap_dss_device *dssdev = mgr->device;
 
-	if (!mgr->device)
+	if (!dssdev)
 		return 0;
 
-	if (mgr->device->type == OMAP_DISPLAY_TYPE_VENC) {
+	if (dssdev->type == OMAP_DISPLAY_TYPE_VENC) {
 		irq = DISPC_IRQ_EVSYNC_ODD | DISPC_IRQ_EVSYNC_EVEN;
 		channel = OMAP_DSS_CHANNEL_DIGIT;
 	} else {
-		if (mgr->device->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE) {
+		if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE) {
 			enum omap_dss_update_mode mode;
-			mode = mgr->device->get_update_mode(mgr->device);
+			mode = dssdev->driver->get_update_mode(dssdev);
 			if (mode != OMAP_DSS_UPDATE_AUTO)
 				return 0;
 
@@ -605,7 +606,7 @@
 	} else {
 		if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE) {
 			enum omap_dss_update_mode mode;
-			mode = dssdev->get_update_mode(dssdev);
+			mode = dssdev->driver->get_update_mode(dssdev);
 			if (mode != OMAP_DSS_UPDATE_AUTO)
 				return 0;
 
@@ -1209,7 +1210,8 @@
 
 		oc->manual_update =
 			dssdev->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE &&
-			dssdev->get_update_mode(dssdev) != OMAP_DSS_UPDATE_AUTO;
+			dssdev->driver->get_update_mode(dssdev) !=
+				OMAP_DSS_UPDATE_AUTO;
 
 		++num_planes_enabled;
 	}
@@ -1250,7 +1252,8 @@
 
 		mc->manual_update =
 			dssdev->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE &&
-			dssdev->get_update_mode(dssdev) != OMAP_DSS_UPDATE_AUTO;
+			dssdev->driver->get_update_mode(dssdev) !=
+				OMAP_DSS_UPDATE_AUTO;
 	}
 
 	/* XXX TODO: Try to get fifomerge working. The problem is that it