[U-Boot] MII on mpc5200

[Jon Smirl]

The u-boot Ethernet support for the mpc5200 turns the device off when
not in use. This also has the side effect of also turning off the mii
commands like 'mii info' and 'mii dump' which don't work (they always
return zeros).  I'm poking around the mpc5200 datasheet and I haven't
stumbled on to the right bits to reenable mii without also enabling
everything else. Can someone familiar with the FEC tell me the right
bits to poke?

-- 
Jon Smirl
jonsmirl at gmail.com