Change in coreboot[master]: amdfwtool: Pack out-of-bounds check into a function and move

[Patrick Georgi (Code Review)]

Attention is currently required from: Bao Zheng, Martin Roth, Marshall Dawson, Zheng Bao.
Patrick Georgi has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/58764 )

Change subject: amdfwtool: Pack out-of-bounds check into a function and move
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Patch Set 3:

(1 comment)

File util/amdfwtool/amdfwtool.c:

https://review.coreboot.org/c/coreboot/+/58764/comment/d3e31717_3cbcb8f7 
PS3, Line 738: 	if (count > MAX_PSP_ENTRIES) {
`count` can be higher here than in line 671, so with after this change, we'd not see errors where we see them now.