Some i.MX platforms like i.MX7S/D uses generic ARM cpuidle
driver and psci method to support cpuidle feature, select
CONFIG_ARM_CPUIDLE by default for such platforms.
Signed-off-by: NAnson Huang <Anson.Huang@nxp.com>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>