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/clockdomain.h b/arch/arm/mach-omap2/clockdomain.h
index 629576b..a868c02 100644
--- a/arch/arm/mach-omap2/clockdomain.h
+++ b/arch/arm/mach-omap2/clockdomain.h
@@ -19,7 +19,7 @@
 
 #include "powerdomain.h"
 #include <plat/clock.h>
-#include <plat/omap_hwmod.h>
+#include "omap_hwmod.h"
 #include <plat/cpu.h>
 
 /*