[L] Change in coreboot[main]: mb/lattepanda: Add support for LattePanda Mu

[Paul Menzel (Code Review)]

Attention is currently required from: Felix Held, KunYi Chen, Nicholas Chin, Nicholas Sudsgaard.

Paul Menzel has posted comments on this change by KunYi Chen. ( https://review.coreboot.org/c/coreboot/+/83719?usp=email )

Change subject: mb/lattepanda: Add support for LattePanda Mu
......................................................................

Patch Set 17: Code-Review+1

(3 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/83719/comment/1191373a_37c98dac?usp... :
PS12, Line 20: Testing with Lite carrier board
> Acknowledged, okay, the payload is default setting […]

Thank you!

Commit Message:

https://review.coreboot.org/c/coreboot/+/83719/comment/53742b09_1fe8ace1?usp... :
PS17, Line 19: UEFITOOL
UEFITool

https://review.coreboot.org/c/coreboot/+/83719/comment/e3288146_6ac0e150?usp... :
PS17, Line 19: original BIOS
Which version?