powerpc/powernv: Add CPU hotplug support
Unplugged CPU go into NAP mode in a loop until woken up
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Unplugged CPU go into NAP mode in a loop until woken up
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>