ASoC: Intel: initial stream_hw_id to invalid value

The stream_hw_id for System stream is 0x0, if we use initial stream_hw_id
value 0, it may return wrong(not committed) stream when calling function
get_stream_by_id() with stream_id=0. Here initial stream_hw_id to invalid
value to fix this issue.

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