CPCI4052: Remove CONFIG_AUTO_COMPLETE and custom baud rate table

This board is getting close to or exceeding the size limit again, remove
CONFIG_AUTO_COMPLETE to save space and while in here switch to the
default and slightly less complete default baudrate table.

Cc: Matthias Fuchs <matthias.fuchs@esd-electronics.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Stefan Roese <sr@denx.de>