linux-phytec-fsl

MLK-14989: ASoC: fsl_rpmsg_i2s: enable pm_qos for audio

with "echo 1 > /sys/class/graphics/fb0/blank", and there is no
usb connected on board, the system may enter low power mode,
then audio playback will be failed. use pm_qos to prevent A7
core enter low power mode during audio playback and recording.

Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>
(cherry picked from commit ea80731e828695bcfbf0d20c966813c3bdddfb88)