ppc: Add P7/P8 Power Management instructions
This adds the ISA 2.06 and later power management instructions (doze, nap, sleep and rvwinkle) and associated wakeup cause testing in LPCR Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> [clg: fixed checkpatch.pl errors ] Signed-off-by: NCédric Le Goater <clg@kaod.org> Reviewed-by: NDavid Gibson <david@gibson.dropbear.id.au> Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
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