[M] Change in coreboot[main]: util/autoport: Extend Add_gpl to more files

[Nicholas Chin (Code Review)]

Attention is currently required from: Angel Pons.

Nicholas Chin has posted comments on this change by Nicholas Chin. ( https://review.coreboot.org/c/coreboot/+/83184?usp=email )

Change subject: util/autoport: Extend Add_gpl to more files
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Patch Set 2:

(1 comment)

File util/autoport/main.go:

https://review.coreboot.org/c/coreboot/+/83184/comment/04c00771_a46069ab?usp... :
PS2, Line 882: 		gma.WriteString(`-- SPDX-License-Identifier: GPL-2.0-or-later
> This has been changed to generate `GPL-2.0-only` instead. […]

I made a note about it in the commit message. I don't feel strongly either way so if anyone objects to changing the one in the generated file I can change it back.