axe(4) doesn't work (patch to replace obsolete if_watchdog interface)

Hi, wpaul.

	I got USB2.0 GbE Ether Adaptor a.k.a. PLANEX GU-1000T, but I
	can't use it by axe(4).  So I tried to improve axe(4) driver,
	but I couldn't improve it:-(.  Would you please fix this driver?

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ehci0: <Intel 82801FB (ICH6) USB 2.0 controller> mem 0xb0040000-0xb00403ff irq 23 at device 29.7 on pci0
ehci0: [GIANT-LOCKED]
ehci0: [ITHREAD]
usb1: EHCI version 1.0
usb1: companion controller, 2 ports each: usb0
usb1: <Intel 82801FB (ICH6) USB 2.0 controller> on ehci0
usb1: USB revision 2.0
uhub1: <Intel EHCI root hub, class 9/0, rev 2.00/1.00, addr 1> on usb1
uhub1: 2 ports with 2 removable, self powered
axe0: <vendor 0x0b95 product 0x1780, class 255/255, rev 2.00/0.01, addr 2> on uhub1
axe0: AX88178, bufsz 4096, boundary 512
miibus0: <MII bus> on axe0
ukphy0: <Generic IEEE 802.3u media interface> PHY 0 on miibus0
ukphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseSX, 1000baseT, 1000baseT-FDX, auto
axe0: WARNING: using obsoleted if_watchdog interface
axe0: WARNING: using obsoleted IFF_NEEDSGIANT flag
axe0: Ethernet address: 00:90:cc:ef:b9:f6
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	ISSUE:
	1. after ether cable connected, axe(4) doesn't link up.
	2. axe0 doesn't link up by 'ifconfig axe0 up', too.
	3. so I couldn't communicate other machines.
	4. I didn't know that axe(4) requires GIANT lock:-(.

	HAPPY:
	1. MAC Address is correct.
	2. I could replace obsolete if_watchdog interface.
	   SEE ALSO: attached patches