MAINTAINERS: new maintainers for QOM

QOM is not a particularly active subsystem now: 51 commits in two years.
But, we need active maintainers to review and merge patches, and Git
shows the following top committers taking on QOM:

    Markus Armbruster <armbru@redhat.com>
    Eduardo Habkost <ehabkost@redhat.com>
    Paolo Bonzini <pbonzini@redhat.com>
    Marc-André Lureau <marcandre.lureau@redhat.com>
    Eric Blake <eblake@redhat.com>

I volunteer myself, and also volunteer Eduardo and Daniel as reviewers
since they understand the code well.

Cc: Andreas Färber <afaerber@suse.de>
Cc: Daniel P. Berrange <berrange@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Suggested-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20190619201050.19040-2-armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Acked-by: Andreas Färber <afaerber@suse.de>

MAINTAINERS

@@ -2029,9 +2029,10 @@ F: docs/interop/qemu-ga-ref.texi
 T: git https://github.com/mdroth/qemu.git qga
 
 QOM
-M: Andreas Färber <afaerber@suse.de>
+M: Paolo Bonzini <pbonzini@redhat.com>
+R: Daniel P. Berrange <berrange@redhat.com>
+R: Eduardo Habkost <ehabkost@redhat.com>
 S: Supported
-T: git https://github.com/afaerber/qemu-cpu.git qom-next
 F: include/qom/
 X: include/qom/cpu.h
 F: qom/