OMAPDSS: move blocking mgr enable/disable to compat layer

dispc_mgr_enable_sync and dispc_mgr_disable_sync are only used with the
compat mode. Non-compat will use the simpler enable and disable
functions.

This patch moves the synchronous enable/disable code to the compat
layer. A new file is created, dispc-compat.c, which contains low level
dispc compat code (versus apply.c, which contains slightly higher level
compat code).

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/omap2/dss/apply.c

@@ -27,6 +27,7 @@
 
 #include "dss.h"
 #include "dss_features.h"
+#include "dispc-compat.h"
 
 /*
  * We have 4 levels of cache for the dispc settings. First two are in SW and