MAINTAINERS: Add myself to a few items

Change-Id: I407cee76cf1eb695732ad54287831a151a8ae3f5
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: http://review.coreboot.org/12491
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marc@marcjonesconsulting.com>
1 file changed