video/omap: remove mux.h include

Including mux.h should no longer be needed for omap2/3/4 SoCs
outside arch/arm/mach-omap2 files.
Signed-off-by: NNicolas Kaiser <nikai@nikai.net>
Acked-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@nokia.com>

drivers/video/omap/lcd_omap3beagle.c

@@ -25,8 +25,6 @@
 #include <linux/gpio.h>
 #include <linux/i2c/twl.h>
 
-#include <plat/mux.h>
-#include <plat/mux.h>
 #include <asm/mach-types.h>
 
 #include "omapfb.h"