ASoC: Intel: Skylake: Add pm ops for skl_rt286 machine

The PM ops are required so that DAPM will suspend and resume the DSP
pipelines properly
Signed-off-by: NJeeja KP <jeeja.kp@intel.com>
Signed-off-by: NVinod Koul <vinod.koul@intel.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

sound/soc/intel/boards/skl_rt286.c

@@ -299,6 +299,7 @@ static struct platform_driver skylake_audio = {
 	.probe = skylake_audio_probe,
 	.driver = {
 		.name = "skl_alc286s_i2s",
+		.pm = &snd_soc_pm_ops,
 	},
 };