[S] Change in coreboot[master]: device/pci_rom: Set VBIOS checksum when filling VFCT table

[Matt DeVillier (Code Review)]

Attention is currently required from: CoolStar, Eric Lai, Martin L Roth, Matt DeVillier, Paul Menzel.

Matt DeVillier has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/77628?usp=email )

Change subject: device/pci_rom: Set VBIOS checksum when filling VFCT table
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Patch Set 4:

(1 comment)

File src/device/pci_rom.c:

https://review.coreboot.org/c/coreboot/+/77628/comment/3b7cc994_a4dc02b1 :
PS4, Line 255: 		header->VbiosContent[VFCT_VBIOS_CHECKSUM_OFFSET] = 0;
> Sure. Just want to know why is not consistent.

it's zeroed out first any time it's being re-calculated. When initially calculated/set, it's already zero. Only need to clear it if it's non-zero (because it was set before)