MPC83xx console : no output after handover

[Matthew L. Creech]

It turned out that the normally-initialized 8250 driver was getting
stomped on by my device tree's serial driver (which is also an 8250) -
apparently CONFIG_SERIAL_8250[_CONSOLE] and CONFIG_SERIAL_OF_PLATFORM
don't play well together.  Disabling the latter fixed my problem.

Thanks for the help, and sorry for the noise.

-- 
Matthew L. Creech