Maintiners for particular sims:

arm	        Nick Clifton <nickc@redhat.com>
ppc		Andrew Cagney <ac131313@redhat.com>
ppc		Geoff Keating <geoffk@redhat.com>
mips		Andrew Cagney <ac131313@redhat.com>
mips		Chris Demetriou <cgd@broadcom.com>
common		Ben Elliston <bje@redhat.com>

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