ASoC: Intel: use common stream allocation method for compressed stream

As added in previosu patch along with stream to piep conversion si required for
compressed audio too

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --cc sound/soc/intel/sst-mfld-platform-compress.c
Simple merge

diff --cc sound/soc/intel/sst-mfld-platform.h
Simple merge