ARM: OMAP: Make plat/omap_hwmod.h local to mach-omap2

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

Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap2/omap_device.h b/arch/arm/mach-omap2/omap_device.h
index 106f506..0933c59 100644
--- a/arch/arm/mach-omap2/omap_device.h
+++ b/arch/arm/mach-omap2/omap_device.h
@@ -34,7 +34,7 @@
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
 
-#include <plat/omap_hwmod.h>
+#include "omap_hwmod.h"
 
 extern struct dev_pm_domain omap_device_pm_domain;