ARM: ixp4xx: use __iomem pointers for MMIO

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

At the moment, this patch conflicts with other patches in linux-next,
need to sort this out.

Cc: Imre Kaloz <kaloz@openwrt.org>
Cc: Krzysztof Halasa <khc@pm.waw.pl>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/arch/arm/mach-ixp4xx/common.c b/arch/arm/mach-ixp4xx/common.c
index a9f8094..fdf91a1 100644
--- a/arch/arm/mach-ixp4xx/common.c
+++ b/arch/arm/mach-ixp4xx/common.c
@@ -53,24 +53,24 @@
  *************************************************************************/
 static struct map_desc ixp4xx_io_desc[] __initdata = {
 	{	/* UART, Interrupt ctrl, GPIO, timers, NPEs, MACs, USB .... */
-		.virtual	= IXP4XX_PERIPHERAL_BASE_VIRT,
+		.virtual	= (unsigned long)IXP4XX_PERIPHERAL_BASE_VIRT,
 		.pfn		= __phys_to_pfn(IXP4XX_PERIPHERAL_BASE_PHYS),
 		.length		= IXP4XX_PERIPHERAL_REGION_SIZE,
 		.type		= MT_DEVICE
 	}, {	/* Expansion Bus Config Registers */
-		.virtual	= IXP4XX_EXP_CFG_BASE_VIRT,
+		.virtual	= (unsigned long)IXP4XX_EXP_CFG_BASE_VIRT,
 		.pfn		= __phys_to_pfn(IXP4XX_EXP_CFG_BASE_PHYS),
 		.length		= IXP4XX_EXP_CFG_REGION_SIZE,
 		.type		= MT_DEVICE
 	}, {	/* PCI Registers */
-		.virtual	= IXP4XX_PCI_CFG_BASE_VIRT,
+		.virtual	= (unsigned long)IXP4XX_PCI_CFG_BASE_VIRT,
 		.pfn		= __phys_to_pfn(IXP4XX_PCI_CFG_BASE_PHYS),
 		.length		= IXP4XX_PCI_CFG_REGION_SIZE,
 		.type		= MT_DEVICE
 	},
 #ifdef CONFIG_DEBUG_LL
 	{	/* Debug UART mapping */
-		.virtual	= IXP4XX_DEBUG_UART_BASE_VIRT,
+		.virtual	= (unsigned long)IXP4XX_DEBUG_UART_BASE_VIRT,
 		.pfn		= __phys_to_pfn(IXP4XX_DEBUG_UART_BASE_PHYS),
 		.length		= IXP4XX_DEBUG_UART_REGION_SIZE,
 		.type		= MT_DEVICE