soc/intel/broadwell: Consolidate SPD handling

Mainboards do not need to know about `pei_data` to tell northbridge code
where to find the SPD data. As done on Haswell, add the `mb_get_spd_map`
function and the `struct spd_info` type to retrieve SPD information from
mainboard code without having to use `pei_data` in said mainboard code.

Unlike Haswell MRC, Broadwell MRC uses all positions of the `spd_data`
array, not just the first. The placeholder SPD address for memory-down
seems to be different as well. Adapt the existing code to handle these
variations. Once complete, the abstraction layer for both MRC binaries
will have the same API.

Change-Id: I92a05003a319c354675368cae8e34980bd2f9e10
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55811
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>

0 files changed, 0 insertions, 0 deletions