The per-lane registers need to be modified in some cases. Also, MRC
does not have any delay after the loop, so remove it.
Tested on out-of-tree HP 630, still boots.
Change-Id: If02e171d2e999f4a5be5b43ecc5aafe8ca092951
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49585
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>