The name "frozen_bus" is misleading: it's not necessarily frozen, it's
just the PE's PCI bus.
Signed-off-by: NSam Bobroff <sam.bobroff@au1.ibm.com>
Reviewed-by: NAlexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>