ARM: mx25: dynamically allocate mxc-ehci devices

According to the reference manual of the i.MX25 the host controller uses an
offset of 0x200 not 0x400 as was specified in the resources for mxc_usbh2.

Needs-Testing: yes
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
diff --git a/arch/arm/plat-mxc/ehci.c b/arch/arm/plat-mxc/ehci.c
index 9915607..f699235 100644
--- a/arch/arm/plat-mxc/ehci.c
+++ b/arch/arm/plat-mxc/ehci.c
@@ -71,7 +71,7 @@
 	unsigned int v;
 #if defined(CONFIG_ARCH_MX25)
 	if (cpu_is_mx25()) {
-		v = readl(MX25_IO_ADDRESS(MX25_OTG_BASE_ADDR +
+		v = readl(MX25_IO_ADDRESS(MX25_USB_BASE_ADDR +
 				     USBCTRL_OTGBASE_OFFSET));
 
 		switch (port) {
@@ -108,7 +108,7 @@
 			return -EINVAL;
 		}
 
-		writel(v, MX25_IO_ADDRESS(MX25_OTG_BASE_ADDR +
+		writel(v, MX25_IO_ADDRESS(MX25_USB_BASE_ADDR +
 				     USBCTRL_OTGBASE_OFFSET));
 		return 0;
 	}