[ARM] Include asm/hardware.h instead of asm/arch/hardware.h

Rationalise hardware.h include.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/plat-omap/pm.c b/arch/arm/plat-omap/pm.c
index 966cca03..1a24e2c 100644
--- a/arch/arm/plat-omap/pm.c
+++ b/arch/arm/plat-omap/pm.c
@@ -509,7 +509,7 @@
  *	@state:		suspend state we're entering.
  *
  */
-//#include <asm/arch/hardware.h>
+//#include <asm/hardware.h>
 
 static int omap_pm_prepare(suspend_state_t state)
 {