[L] Change in coreboot[master]: intelblocks/vtd: Add VT-d block with DMA protection API

[Michał Żygowski (Code Review)]

Attention is currently required from: Michał Kopeć, Angel Pons.

Michał Żygowski has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/68449 )

Change subject: intelblocks/vtd: Add VT-d block with DMA protection API
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Patch Set 7:

(1 comment)

File src/soc/intel/common/block/vtd/vtd.c:

https://review.coreboot.org/c/coreboot/+/68449/comment/6b2db699_a36435e5 
PS7, Line 158: 		if (vtd_read32(vtd_base, PMEN_REG) & PMEN_PRS) {
> Looks like these `if`s don't need to be nested

This is a recheck if the protection has been really disabled after clearing PMEN_EPM. What do you mean by "don't need to be nested"?