ASoC: SOF: Drop unused DSP power states: D3_HOT and D3_COLD

The only reference to D3_HOT and D3_COLD DSP power state is in
intel/hda-dsp.c in form of a dev_dbg() print.

Remove them as they are not used and even if they are they could be
re-added via the substate.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20220210150525.30756-2-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>