ARM: imx: ehci: use void __iomem * to hold i/o addresses

This fixes:

	arch/arm/plat-mxc/ehci.c: In function 'mxc_initialize_usb_hw':
	arch/arm/plat-mxc/ehci.c:260: warning: assignment makes integer from pointer without a cast
	arch/arm/plat-mxc/ehci.c:263: warning: assignment makes integer from pointer without a cast
	arch/arm/plat-mxc/ehci.c:270: warning: assignment makes integer from pointer without a cast

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

arch/arm/plat-mxc/ehci.c

@@ -249,8 +249,8 @@ int mxc_initialize_usb_hw(int port, unsigned int flags)
 #ifdef CONFIG_ARCH_MX51
 	if (cpu_is_mx51()) {
 		void __iomem *usb_base;
-		u32 usbotg_base;
-		u32 usbother_base;
+		void __iomem *usbotg_base;
+		void __iomem *usbother_base;
 		int ret = 0;
 
 		usb_base = ioremap(MX51_OTG_BASE_ADDR, SZ_4K);