In DDR3 DLL-Off mode is an optional feature advertised by SPD.
Honor the SPD and only use DLL-Off mode when all DIMMs on the
same channel indicate support for it.
The same is done on MRC.bin.
Tested on Lenovo X220: Still boots fine.
Change-Id: Ief4bfb9e045cad7ff9953f6fda248586ea951a52
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79758
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
68642ca981