haswell/lynxpoint: Add native DMI init

haswell/lynxpoint: Add native DMI init

Implement native DMI init for Haswell and Lynx Point. This is only
needed on non-ULT platforms, and only when MRC.bin is not used.

TEST=Verify DMI initialises correctly on Asrock B85M Pro4.

Change-Id: I5fb1a2adc4ffbf0ebbf0d2d3a444055c53765faa
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64177
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>