usb: add HAS_IOMEM dependency to USB_PXA27X

drivers/built-in.o: In function `pxa_udc_probe':
/home/vegard/linux/drivers/usb/gadget/udc/pxa27x_udc.c:2430: undefined reference to `devm_ioremap_resource'

Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/gadget/udc/Kconfig b/drivers/usb/gadget/udc/Kconfig
index 70feaf2..d6ad7e6 100644
--- a/drivers/usb/gadget/udc/Kconfig
+++ b/drivers/usb/gadget/udc/Kconfig
@@ -188,6 +188,7 @@
 
 config USB_PXA27X
 	tristate "PXA 27x"
+	depends on HAS_IOMEM
 	help
 	   Intel's PXA 27x series XScale ARM v5TE processors include
 	   an integrated full speed USB 1.1 device controller.