chipphyforce(phyaddr)

1. if phyaddr is 30 (EPHY_NOREG)
   1. return
2. if forced Ethernet speed set to auto
   1. return

3. write the result of call chipphyrd with phyaddr and 0 into ctl

4. unset bits CTL_SPEED and CTL_SPEED_MSB and CTL_ANENAB and CTL_DUPLEX in ctl
5. if full duplex
   1. binary or ctl with CTL_DUPLEX
6. if Ethernet speed is 100MBit/s
   1. binary or ctl with CTL_SPEED_100
7. if Ethernet speed is 1000MBit/s
   1. binary or ctl with CTL_SPEED_1000

8. call chipphywr with phyaddr, 0 and ctl given