alc(4) diff that needs testing

[Kevin Lo]

Hi,

The diff http://www.kevlo.org/alc.diff adds support for the
Atheros AR8131/AR8132 NIC(also known as Attansic L1C/L2C).

Tested on the ASUS Eee PC 1008HA:

$ dmesg | grep alc
alc0 at pci2 dev 0 function 0 "Attansic Technology L2C" rev 0xc0: apic 2
int 17 (irq 10), address 00:26:18:04:fd:9c
atphy0 at alc0 phy 0: F1 10/100/1000 PHY, rev. 11

$ ifconfig alc0
alc0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        lladdr 00:26:18:04:fd:9c
        priority: 0
        groups: egress
        media: Ethernet autoselect (100baseTX
full-duplex,rxpause,txpause)
        status: active
        inet6 fe80::226:18ff:fe04:fd9c%alc0 prefixlen 64 scopeid 0x1
        inet 192.168.0.143 netmask 0xffffff00 broadcast 192.168.0.255

        Kevin