usb: add HAS_IOMEM dependency to USB_APPLEDISPLAY

warning: (USB_APPLEDISPLAY) selects BACKLIGHT_LCD_SUPPORT which has unmet direct dependencies (HAS_IOMEM)
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/misc/Kconfig

@@ -150,6 +150,7 @@ config USB_FTDI_ELAN
 
 config USB_APPLEDISPLAY
 	tristate "Apple Cinema Display support"
+	depends on HAS_IOMEM
 	select BACKLIGHT_LCD_SUPPORT
 	select BACKLIGHT_CLASS_DEVICE
 	help