device-fsl

MA-13226-2 audio: change lpa_enable to vendor.audio.lpa.enable

Change below property name:
- lpa_enable      -> vendor.audio.lpa.enable
- lpa_hold_second -> vendor.audio.lpa.hold_second
- lpa_period_ms   -> vendor.audio.lpa.period_ms

Change-Id: Ia926bd3c06c5aea40b4c2ab58342edd9d40a65c4
Signed-off-by: Jindong <jindong.yue@nxp.com>
Reviewed-on: http://androidsource.ap.freescale.net/project/6326
Reviewed-by: fang hui <hui.fang@nxp.com>