[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/include/asm-arm/arch-omap/gpio.h b/include/asm-arm/arch-omap/gpio.h
index 1b38857..f486b72 100644
--- a/include/asm-arm/arch-omap/gpio.h
+++ b/include/asm-arm/arch-omap/gpio.h
@@ -26,7 +26,7 @@
 #ifndef __ASM_ARCH_OMAP_GPIO_H
 #define __ASM_ARCH_OMAP_GPIO_H
 
-#include <asm/arch/hardware.h>
+#include <asm/hardware.h>
 #include <asm/arch/irqs.h>
 #include <asm/io.h>