Change in coreboot[master]: [DO NOT SUBMIT] soc/intel/alderlake: Enable MCHBAR in bootblock

[Angel Pons (Code Review)]

Attention is currently required from: Wonkyu Kim, Subrata Banik, Tim Wawrzynczak.
Angel Pons has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/63890 )

Change subject: [DO NOT SUBMIT] soc/intel/alderlake: Enable MCHBAR in bootblock
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Patch Set 1:

(1 comment)

File src/soc/intel/alderlake/bootblock/bootblock.c:

https://review.coreboot.org/c/coreboot/+/63890/comment/da9f323f_5de6caca 
PS1, Line 23: 	sa_set_pci_bar(soc_fixed_pci_resources, ARRAY_SIZE(soc_fixed_pci_resources));
> I also tried this, it's working after bootblock_systemagent_early_init function.

Ah, good catch, thanks. `bootblock_systemagent_early_init()` enables PCIEXBAR, which is needed to enable MCHBAR using `sa_set_pci_bar()`.