ASoC: SOF: sof-priv: Remove stale snd_sof_ipc_stream_pcm_params() declaration

ASoC: SOF: sof-priv: Remove stale snd_sof_ipc_stream_pcm_params() declaration

The implementation for snd_sof_ipc_stream_pcm_params() does not exist,
remove it from the header file.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20220310042720.976809-2-ranjani.sridharan@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>