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/i2c.c b/arch/arm/mach-omap2/i2c.c
index 84b0d9f..8b39937 100644
--- a/arch/arm/mach-omap2/i2c.c
+++ b/arch/arm/mach-omap2/i2c.c
@@ -20,7 +20,7 @@
  */
 
 #include "common.h"
-#include <plat/omap_hwmod.h>
+#include "omap_hwmod.h"
 #include "omap_device.h"
 
 #include "mux.h"