ASoC: intel: Revert "ASoC: Intel: remove unused function hsw_pcm_free_modules()"

This reverts commit 506c148e.

We still need this hsw_pcm_free_modules(), we plan to remove the
runtime modules at both fw_unload(D0->D3) and snd_soc_sst_haswell_pcm
module removing.

Signed-off-by: Jie Yang <yang.jie@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>