[U-Boot] [PATCH V2] MAKEALL: Add -m/-M option to determine maintainers

[Marek Vasut]

> The -m option tries to find the board in MAINTAINERS file and figure out
> the email. The -M option lists boards including their maintainers emails
> and all affiliated emails. There are multiple strategies used to retrieve
> these emails:

Ignore this one please.

Best regards,
Marek Vasut