ASoC: Intel: avs: Introduce PCM power management routines

ASoC: Intel: avs: Introduce PCM power management routines

Implement suspend/resume() operations for component drivers. For most
scenarios, the PM flow is similar to standard streaming one, except for
the part where the position register are being saved and the lack of PCM
pages freeing. To reduce code duplication, all avs_dai_suspend_XXX() and
avs_dai_resume_XXX() functions reuse their non-PM equivalents.

Given that path binding/unbinding happens only in FE part of the stream,
the order of suspend() goes:

1. hw_free() all FE DAIs, paths are unbound here
2. hw_free() all BE DAIs

Consequently, for resume() its:

1. hw_params() all BE DAIs
2. hw_params() all FE DAIs, paths are bound here
3. prepare() all BE DAIs
4. prepare() all FE DAIs

As component->suspend/resume() do not provide substream pointer, store
it ourselves so that the PM flow has all the necessary information to
proceed.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20221027124702.1761002-3-cezary.rojewski@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>