MAINTAINERS: Update mainboards

- AMD reference boards are maintained at least for odd fixes.
- Google panther has become a variant of Beltino, so remove it.
- Remove people whose email addresses are bouncing email.
- Remove people who responded to my email about being a maintainer and
asked to be removed.
- Alphabetize list

Signed-off-by: Martin Roth <gaumless@gmail.com>
Change-Id: Ic6ecaae77df2f2edaf724160bce04c038cbd115e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68707
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Singer <felixsinger@posteo.net>

0 files changed, 0 insertions, 0 deletions