ASoC: SOF: ipc4-pcm: Enable delay reporting for ChainDMA streams

All streams (currently) which is configured to use ChainDMA can only work
on Link/host DMA pairs where the link side position can be access via host
registers (like HDA on CAVS 2.5 platforms).

Since the firmware does not provide time_info for ChainDMA, unlike for HDA
stream, the kernel should calculate the start and end offsets that is
needed for the delay calculation.

With this small change we can report accurate delays when the stream is
configured to use ChainDMA.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Liam Girdwood <liam.r.girdwood@intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://patch.msgid.link/20250619102848.12389-1-peter.ujfalusi@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>