MIPS: JZ4770: Cosmetic fix in setup.c
MIPS: JZ4770: GCW0: Update defconfig to enable serial console

The order of the two "console=" arguments is important: when exchanged,
ncurses applications start displaying in monochrome. I guess the serial
console uses a different terminal emulation than the fb console does.
MIPS: JZ4770: GCW0: Switch defconfig to external WiFi driver

Neither driver works for everyone, but overall we get better results
with the external driver.