[L] Change in flashrom[master]: doc: Add documentation license

[Anastasia Klimchuk (Code Review)]

Attention is currently required from: Alexander Goncharov, Patrick Georgi, Stefan Reinauer, Thomas Heijligen.

Anastasia Klimchuk has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/75727?usp=email )

Change subject: doc: Add documentation license
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Patch Set 1:

(1 comment)

Patchset:

PS1: 
I have some issues with nested that which do not behave :\ but meanwhile I am looking into nested lists, I wanted to ask.

I appreciate an advice, because I am not fully familiar with licensing matters...
Am I correct to create a page with license text? (I copied text from coreboot page). Is there anything else needed for the docs?
For example on coreboot website there is in the footer of every page:
© Copyright CC-by 4.0 the coreboot project

do we need the same?

Thank you so much for help!