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>

arch/arm/mach-omap2/hdq1w.c

@@ -27,7 +27,7 @@
 #include <linux/err.h>
 #include <linux/platform_device.h>
 
-#include <plat/omap_hwmod.h>
+#include "omap_hwmod.h"
 #include "omap_device.h"
 #include "hdq1w.h"