OMAP: DSS2: remove extra includes from include/video/omapdss.h

omapdss.h included platform_device.h and atomic.h, neither of which is
needed by omapdss.h. Remove those includes from omapdss.h, and fix the
affected .c files which did not include platform_device.h even though
they should.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/video/omap2/dss/dispc.c b/drivers/video/omap2/dss/dispc.c
index 7a9a2e7..a9eebd8 100644
--- a/drivers/video/omap2/dss/dispc.c
+++ b/drivers/video/omap2/dss/dispc.c
@@ -33,6 +33,7 @@
 #include <linux/workqueue.h>
 #include <linux/hardirq.h>
 #include <linux/interrupt.h>
+#include <linux/platform_device.h>
 
 #include <plat/sram.h>
 #include <plat/clock.h>