Declare pointers to CSR register space to be volatile. This seems to
cure the problems I was having with interrupts not being acknowledged
on time. This fixes a problem I observed where starting two ping -f
processes at 10Mbps would cause an adapter check due to TX GO commands
being issued before TXEOC interrupts were being acked.
Also fix a small problem with tl_start(): the mechanism I was using
to queue new packets onto the TX chain was bogus.
Change adapter check handler so that it resets card state after
tl_softreset() is stored.
Moved all EEPROM-related macro definitions into if_tlreg.h.
Don't allow an autoneg session to start until after the TX queue has
been drained, and don't transmit anything until after the autoneg
session is complete.
Also add support for two more Compaq ThunderLAN-based cards, and three
cards from Olicom which also use the ThunderLAN chip. The only thing
different about the Olicom cards is that they store the station address
at a different location within the EEPROM.