topology2: Add kcps pipeline attribute

[jsarha]

Adds kcps attribute to pipeline class with 400000 default value, and overrides the value in deepbuffer-playback pipeline with 50000.

[jsarha]

Not sure if I should add some constraints etc., but AFAIK this should be enough get started, and to be able to test Linux driver side.

[lgirdwood]

@yongzhi1 which pipelines do you expect to use LF clock, pls let @jsarha know so we can update this PR.

[jsarha]

Added {
# Token reference and type
token_ref "sof_tkn_scheduler.word"
} to attribute definition. Without it nothing is added to the topology.

[jsarha]

Finally the deepbuffer-pipeline has different kcps value than the rest of the pipelines.

[lgirdwood]

@jsarha we also need the real deepbuffer number on MTL too with current code.

[lgirdwood]

Both this value and the 400k value need to come from a platform file. e.g.

include(platform.conf)
kcps PLATFORM_DEEPBUFFER_KCPS

[plbossart]

Not sure why @lgirdwood, if you have processing for the deep buffer pipeline, that can be entirely dependent on the module that's added on this pipeline. Different algorithms might have different requirements, there's no good default value that work for a given platform across all algorithms or configurations.

[lgirdwood]

It should only be overridden in the machine topology file where it can be used to adjust machine specific pipelines (aligns with Windows use case now).