ARM: OMAP: Make omap_device local to mach-omap2

Let's make omap_device local to mach-omap2 for
ARM common zImage support.

Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap2/usb-host.c b/arch/arm/mach-omap2/usb-host.c
index 3c43449..84d8228 100644
--- a/arch/arm/mach-omap2/usb-host.c
+++ b/arch/arm/mach-omap2/usb-host.c
@@ -26,7 +26,7 @@
 #include <asm/io.h>
 
 #include <plat/usb.h>
-#include <plat/omap_device.h>
+#include "omap_device.h"
 
 #include "mux.h"