misc: Convert MAINTAINERS to YAML

Convert MAINTAINERS to YAML and rename it to MAINTAINERS.yaml.

Change-Id: I0965b89e7afceb53f6c2a6a183cc1514f5a9d7a0
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/37035
Reviewed-by: Hoa Nguyen <hoanguyen@ucdavis.edu>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
2 files changed