Add documentation for MP service PPI using EFI interface
on Intel 9th Gen Platforms.
Documented so far:
* Problem Statement
* New Design Proposal
* API interface
* Code Flow changes
* Benefits
BRANCH=none
BUG=b:74436746
TEST=none
Change-Id: I5b6096ef31d8a523c00cbad39ab9d4884e735fde
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/25921
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
55b183f112
