greybus: audio: Update pm runtime support in dai_ops callback

Ensure pm runtime get_sync/put protection in codec_dai ops callback
functions before accessing apbridge.

Signed-off-by: Vaibhav Agarwal <vaibhav.agarwal@linaro.org>
Reviewed-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>