[coreboot] Memory initialisation error

[Andy Pont]

Hello,

I have some life out of my Comet Lake based board but the debug output 
ends with

FMAP: area RW_MRC_CACHE found @ 420000 (65536 bytes)
MRC: no data in 'RW_MRC_CACHE'
PRMRR disabled by config.
WEAK: 
src/soc/intel/cannonlake/romstage/fsp_params.c/mainboard_memory_init_params 
called
FspMemoryInit returned 0x80000007
FspMemoryInit returned an error!

The board has all of the memory soldered directly down.  The spd.bin 
file in the build directory is 0 bytes.  Is there a way to extract the 
correct SPD information from either the original UEFI firmware or from a 
running Linux system?

-Andy.