ASoC: Intel: Skylake: remove pm_runtime_get/put calls

The ASoC core already does pm_runtime_get/put in the core before
opening/closing the devices.
So we do not need to do this is driver, hence remove

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>