RT2880 has a different location for the early serial port.
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Acked-by: NGabor Juhos <juhosg@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5170/

Add the code needed to make early printk work.
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Signed-off-by: NGabor Juhos <juhosg@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/4897/