Change in coreboot[master]: documentation: Add documentation for Purism Librem 14

[Matt DeVillier (Code Review)]

Attention is currently required from: Paul Menzel, Angel Pons, Michael Niewöhner.
Matt DeVillier has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/51550 )

Change subject: documentation: Add documentation for Purism Librem 14
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Patch Set 6:

(1 comment)

File Documentation/mainboard/purism/librem_14.jpg:

PS6:
> Do you have an image with a transparent background? Also, I'd try to avoid having so much empty spac […]

I do, but the png with transparency was a larger file size. I'll try cropping and see what I can do