hw: Consistently name Error ** objects errp, and not err
Signed-off-by: NMarkus Armbruster <armbru@redhat.com> Signed-off-by: NAndreas Färber <afaerber@suse.de>
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Signed-off-by: NMarkus Armbruster <armbru@redhat.com> Signed-off-by: NAndreas Färber <afaerber@suse.de>