[coreboot] [PATCH]Initialize CMOS from CBFS if checksum is incorrect

[Patrick Georgi]

Hi,

attached patch provides a way to initialize the CMOS if the checksum
test failed. For this to work, a CMOS dump must be stored as
"cmos.default" (filetype "cmos default") in CBFS.
After CMOS is rewritten, the system is rebooted to ensure that all parts
of coreboot run with the new (working) configuration.

For a couple of boards, a "cmos_defaults_loaded" field is added to
cmos.layout. This can be used to tell the system that defaults were
applied by setting this flag in cmos.default and parsing/resetting it in
the system.

Signed-off-by: Patrick Georgi