linux-wandboard

MLK-17515-1: ASoC: imx-ak4458: add pdn gpio for machine driver

There is two ak4458 codecs which share some pdn gpio. If assign
the pdn gpio to one codec, will cause the another codec error:

ak4458 1-0012: Unable to sync registers 0x0-0x0. -6

The reason is that if the codec driver is trying to do regcache_sync,
but another codec is resetting the pdn gpio in same time, the
regcache_sync will fail.

So Move the pdn gpio to machine driver, machine driver will
control this gpio for two codecs.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: Cosmin Samoila <cosmin.samoila@nxp.com>
(cherry picked from commit c0fa0ee8fdd965040e2ee322cd99b45bc0c60dd6)