USB_RTL8150 must select MII to avoid link errors.

Stolen from a patch by Randy Dunlap.
Signed-off-by: Adrian Bunk <bunk@stusta.de>

drivers/usb/net/Kconfig

@@ -84,6 +84,7 @@ config USB_PEGASUS
 config USB_RTL8150
 	tristate "USB RTL8150 based ethernet device support (EXPERIMENTAL)"
 	depends on EXPERIMENTAL
+	select MII
 	help
 	  Say Y here if you have RTL8150 based usb-ethernet adapter.
 	  Send me <petkan@users.sourceforge.net> any comments you may have.