ASoC: Intel: Add generic support for DSP wake, sleep and stall

Add generic functions to support DSP sleep, wake and stall.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --cc sound/soc/intel/sst-dsp-priv.h
Simple merge

diff --cc sound/soc/intel/sst-dsp.c
Simple merge

diff --cc sound/soc/intel/sst-dsp.h
Simple merge