AR8316 behind a GPIO bitbanged MDIO bus fails to drive the turnaround bit
to low despite returning a valid value. Ignore it and just use the
returned value anyway.
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@28422 3c298f89-4303-0410-b956-a3cf2f4a3e73
decreases CPU load with the default firewall for routing 95 mbit/s from 78% to 55%
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@27878 3c298f89-4303-0410-b956-a3cf2f4a3e73