ASoC: Intel: Skylake: Correct the runtime handler behaviour

On runtime pm resume, we need to download the firmware, also on
suspend we need to ensure all the interrupts from controller and
DSP are disabled.

Also since we download the firmware on resume, we don't need to do
so on init, so remove that bit

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