powerpc/pseries: Use 'true' instead of '1' for orderly_poweroff

orderly_poweroff is expecting a bool parameter, so
use 'true' instead '1'

Signed-off-by: liguang <lig.fnst@cn.fujitsu.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
1 file changed