ARM: lpc32xx: use __iomem pointers for MMIO

ARM is moving to stricter checks on readl/write functions,
so we need to use the correct types everywhere.

Cc: Roland Stigge <stigge@antcom.de>
Cc: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/arch/arm/mach-lpc32xx/include/mach/hardware.h b/arch/arm/mach-lpc32xx/include/mach/hardware.h
index 33e1dde..69065de 100644
--- a/arch/arm/mach-lpc32xx/include/mach/hardware.h
+++ b/arch/arm/mach-lpc32xx/include/mach/hardware.h
@@ -25,7 +25,7 @@
 /*
  * This macro relies on fact that for all HW i/o addresses bits 20-23 are 0
  */
-#define IO_ADDRESS(x)	(((((x) & 0xff000000) >> 4) | ((x) & 0xfffff)) |\
+#define IO_ADDRESS(x)	IOMEM(((((x) & 0xff000000) >> 4) | ((x) & 0xfffff)) |\
 			 IO_BASE)
 
 #define io_p2v(x)	((void __iomem *) (unsigned long) IO_ADDRESS(x))