ASoC: Intel: Skylake: Disable notifications at boot after DSP FW init

DSP firmware sends notification every 1ms, which is disabled in runtime
suspend. But if a system has no runtime pm, we keep getting
notification, so disable after FW init as well.

Signed-off-by: G Kranthi <gudishax.kranthikumar@intel.com>
Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>