[S] Change in coreboot[master]: mb/google/myst: Inject SPD binaries to APCB

[Karthik Ramasubramanian (Code Review)]

Attention is currently required from: Jon Murphy, Martin Roth, Tim Van Patten.

Karthik Ramasubramanian has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/74746 )

Change subject: mb/google/myst: Inject SPD binaries to APCB
......................................................................

Patch Set 1:

(1 comment)

File src/mainboard/google/myst/Makefile.inc:

https://review.coreboot.org/c/coreboot/+/74746/comment/4c54efc0_c07b8016 
PS1, Line 18: APCB_PHX_D5
> My question is in regards to PHX (bringup SOC) and the follow-on SOCs that Myst is intending to ship […]

APCB so far is known/expected to be compatible between Phoenix and its refresh SoCs. If there are any unforeseen incompatibilities, then we have to work with AMD and figure out a way to edit the APCB binary (just like how SPD binary is injected here).