ARM: OMAP2+: Make l4_3xxx.h local

This can be local to mach-omap2.
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/omap_hwmod_3xxx_data.c

@@ -21,7 +21,7 @@
 #include <plat/dma.h>
 #include <plat/serial.h>
 #include "l3_3xxx.h"
-#include <plat/l4_3xxx.h>
+#include "l4_3xxx.h"
 #include <plat/i2c.h>
 #include <plat/mmc.h>
 #include <linux/platform_data/asoc-ti-mcbsp.h>