Seppo Ingalsuo

Added topology & blob with 1 ms FFT hop for LL pipeline processing example.

> @singalsu I've merged since functional CI has passed but pls do fix the doxygen warnings in incremental PR > > ``` > [0/2] cd /home/runner/work/sof/sof/docbuild && doxygen sof.doxygen >...

This PR depends on https://github.com/thesofproject/sof/pull/10329 and kernel patch by @ranj063 .

Build variants with echo reference, for both speaker and jack, just speaker, just jack, echoref but without speaker post-processing. Echo reference for jack: Echo reference for jack and speaker, no...

> Can echo ref be always available in the topology and switch on/off by opening the PCM ? Yep, the PCMs can be used or ignored. If there is no...

I updated the virtual DAI name to LoopbackCapture_virtual_DAI, and added build for sof-ptl-rt721-echoref.tplg.

The virtual DAI name is shortened to "Loopback_Virtual". The previous name was too long for kernel name limit. This matches the updated https://github.com/thesofproject/linux/pull/5609 .

Updates: I removed the $JACK_RATE from speaker pipelines. Also I moved the basic host-copier output formats to class definition, so they don't need to be repeated for speaker. Same also...

From Jenkins build log here, need the alsa-lib patch: ``` [9/372] Generating sof-tgl-nocodec.tplg ALSA lib pcm.c:366:(split_rate) unsupported stream rate 24000 ALSA lib parser.c:211:(tplg_load_config) failed to parse topology Unable to load...

> LGTM, I guess you will make non draft when ALSA part is resolved. Yep, this simple add only enables tplg build, the aplay - alsa-lib - kernel runtime issue...