Maintainers for particular sims:
+aarch64 Nick Clifton <nickc@redhat.com>
arm Nick Clifton <nickc@redhat.com>
bfin Mike Frysinger <vapier@gentoo.org>
cr16 M R Swami Reddy <MR.Swami.Reddy@nsc.com>
common Ben Elliston <bje@gnu.org>
mips Andrew Cagney <ac131313@redhat.com>
mips Chris Demetriou <cgd@netbsd.org>
+mips Thiemo Seufer <ths@networkno.de>
ppc Geoff Keating <geoffk@geoffk.org>
ppc Andrew Cagney <cagney@gnu.org>