AtherosL1Ethernet.kext for Mavericks

Open source iats Atheros L1 network adapter driver compiled for Mavericks. Source taken from the project on Google Code (svn/sl/atl1) and not modified, except to change the build target to OS X 10.9.

I've tested it for weeks on my P5L-MX with 10.9.3 through 10.9.5 and it seems to work fine so far. Should work for various other boards, particularly by ASUS.

Installation: works well in an EFI system partition and should also work fine in /Extra.

Compiled in Xcode 6.0.1.