[ARM] 1/4: Move include of asm/hardware.h to asm-arm/arch-*/io.h

Including asm/hardware.h into asm/io.h can cause #define clashes
between platform specific definitions and driver local definitions.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/include/asm-arm/arch-imx/io.h b/include/asm-arm/arch-imx/io.h
index 28a4cca..b191cdd 100644
--- a/include/asm-arm/arch-imx/io.h
+++ b/include/asm-arm/arch-imx/io.h
@@ -20,6 +20,8 @@
 #ifndef __ASM_ARM_ARCH_IO_H
 #define __ASM_ARM_ARCH_IO_H
 
+#include <asm/hardware.h>
+
 #define IO_SPACE_LIMIT 0xffffffff
 
 #define __io(a)		((void __iomem *)(a))