linux/modules: add support for Asix ax88179 USB-Gigabit Ethernet adapters

requested and tested by forum user OWonPi
https://forum.openwrt.org/viewtopic.php?id=55495



Signed-off-by: Dirk Neukirchen <dirkneukirchen@web.de>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@44256 3c298f89-4303-0410-b956-a3cf2f4a3e73