No functional change, only move code here and there,
and add some comment.

Signed-off-by: Amery Song <chao.song@intel.com>

This patch renames func_dump_pipeline to format_pipeline,
and renames func_export_pipeline to export_pipeline.

Signed-off-by: Amery Song <chao.song@intel.com>

To reuse test cases from sof-test repo, we need to
dump pipeline info from proc, just like dump pipeline
info from topology on SOF platform.

As there is no format/channel/rate information in proc,
we hard code some default format/channel/rate values,
this should be enough for legacy HDA platform test.

Signed-off-by: Amery Song <chao.song@intel.com>

We don't need a complex filter for proc pipeline
as topology pipeline does. So a simple type filter
for proc pipeline is implemented in this patch.

This makes it possible for some test cases to run
under legacy HDA platform without any script change.

Signed-off-by: Amery Song <chao.song@intel.com>

This patch adds is_sof_used function to check
we are running test on SOF platform or legacy
HDA platform.

Signed-off-by: Amery Song <chao.song@intel.com>

Signed-off-by: Amery Song <chao.song@intel.com>