[ARM] l7200: avoid polluting the kernel's namespace

Avoid unnecessarily pollution of the kernel's namespace by avoiding
mach/hardware.h in mach/io.h.  Include this header file where necessary.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-l7200/include/mach/io.h

@@ -10,8 +10,6 @@
 #ifndef __ASM_ARM_ARCH_IO_H
 #define __ASM_ARM_ARCH_IO_H
 
-#include <mach/hardware.h>
-
 #define IO_SPACE_LIMIT 0xffffffff
 
 /*