Change in coreboot[master]: payloads/external: Add support for coreDOOM payload

[Paul Menzel (Code Review)]

Attention is currently required from: Martin L. Roth, Stefan Reinauer, Nicholas Chin.
Paul Menzel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/57222 )

Change subject: payloads/external: Add support for coreDOOM payload
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Patch Set 4: Code-Review+1

(3 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/57222/comment/3c94916a_40dab4a8 
PS4, Line 9: coreDOOM is a port of the doomgeneric source port of DOOM to libpayload, drawing
Please wrap lines after 72 characters.

Patchset:

PS3:
> Hmm, I've only tested it with "CONFIG_GENERIC_LINEAR_FRAMEBUFFER", so I'm not sure what Kconfig sett […]

I got it to work with QEMU now. Thank you.

File payloads/Kconfig:

https://review.coreboot.org/c/coreboot/+/57222/comment/93b1d5d9_0c446e61 
PS4, Line 154: 	  or any other payload that can load additional payloads.
… It needs the generic linear framebuffer.