nommu: Add MMU-less support for the RealView boards

This patch defines the IO_ADDRESS macro for the !CONFIG_MMU case.
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>

arch/arm/mach-realview/include/mach/hardware.h

@@ -25,6 +25,7 @@
 #include <asm/sizes.h>
 
 /* macro to get at IO space when running virtually */
+#ifdef CONFIG_MMU
 /*
  * Statically mapped addresses:
  *
@@ -33,6 +34,9 @@
  * 1fxx xxxx -> fexx xxxx
  */
 #define IO_ADDRESS(x)		(((x) & 0x03ffffff) + 0xfb000000)
+#else
+#define IO_ADDRESS(x)		(x)
+#endif
 #define __io_address(n)		__io(IO_ADDRESS(n))
 
 #endif