[coreboot-gerrit] Change in coreboot[master]: soc/{apl,glk}: Allow to select the primary graphics device

[Maxim Polyakov (Code Review)]

Attention is currently required from: Nico Huber, Mario Scheithauer, Angel Pons, Werner Zeh.
Maxim Polyakov has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/39374 )

Change subject: soc/{apl,glk}: Allow to select the primary graphics device
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Patch Set 31:

(3 comments)

Patchset:

PS31:
> with

Ok, thanks for testing!

PS31: 
@Angel, @Nico, do you have any other comments?

File src/soc/intel/apollolake/chip.h:

https://review.coreboot.org/c/coreboot/+/39374/comment/5f015490_e52509e9 
PS17, Line 45: PRIMARY_AUTO = 0,
             : 	PRIMARY_IGD  = 2,
             : 	PRIMARY_PCI  = 3,
> Angel, did you check some code drop or the current binary? If it really […]

In any case, these changes will help us get rid of this parameter in the romstage (CB:39375, CB:56517 and for each new port of the motherboard). Also, some products based on the Kontron module don't use IGD and connecting an external graphics card is very useful for testing.