xics: drop ICPStateClass::cpu_setup() handler
The cpu_setup() handler is only implemented by xics_kvm, where it really does a typical "realize" job. Moreover, the realize() handler is called shortly after cpu_setup(), on the same path. This patch converts xics_kvm to implement realize() instead of cpu_setup(). Signed-off-by: NGreg Kurz <groug@kaod.org> Reviewed-by: NCédric Le Goater <clg@kaod.org> Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
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