ASoC: Intel: Fix stream position pointer.

Read the stream offset and presentation position from DSP memory rather
than using the old estimated position. This fixes timing issues with
pulseaudio.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --cc sound/soc/intel/sst-haswell-ipc.c
Simple merge

diff --cc sound/soc/intel/sst-haswell-ipc.h
Simple merge

diff --cc sound/soc/intel/sst-haswell-pcm.c
Simple merge