ASoC: SOF: pm: Unify suspend/resume routines

Unify the suspend/resume routines for both the D0I3/D3
DSP targets in sof_suspend()/sof_resume().

Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200129220726.31792-3-pierre-louis.bossart@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>