usb: add HAS_IOMEM dependency to USB_OXU210HP_HCD

drivers/built-in.o: In function `oxu_drv_probe':
/home/vegard/linux/drivers/usb/host/oxu210hp-hcd.c:3821: undefined reference to `devm_ioremap_resource'
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/Kconfig

@@ -332,6 +332,7 @@ endif # USB_EHCI_HCD
 
 config USB_OXU210HP_HCD
 	tristate "OXU210HP HCD support"
+	depends on HAS_IOMEM
 	---help---
 	  The OXU210HP is an USB host/OTG/device controller. Enable this
 	  option if your board has this chip. If unsure, say N.