1. Added new workaround for 5705 to improve bit error rate.

2. Changed to use read-modify-write to set the extended packet bit in
tg3_phy_reset.

3. Removed some phy setup code in tg3_phy_probe. All of that is already
in the end of tg3_phy_reset. Writing to the phy during probe time may
contend with ASF because ASF is constantly reading phy registers to
determine the link.


4. Removed the write to phy register 0x18 in tg3_phy_copper_begin. Not
sure what it was for and it will overwrite that regsiter.