[LinuxBIOS] co processor support and other

[Lu, Yinghai]

Just check in
1. r2308: Option CONFIG_CONSOLE_VGA_ONBOARD_AT_FIRST
    It decides use onboard VGA or add on vga adapter
2. r2309: reduce clear ECC time from 2.1x to 1.1x. need to enable
SERIAL_CPU_INIT
3. r2310: enable ht chain for drc co processor in s2891.

Please check that.

Steve,
I still wonder how do you init the memory on your co processor without
the spd rom access. ( hard coded)

Thanks

Yinghai Lu