[RFC]topology: add smart amp for apl pcm512x

[xiulipan]

Add smart amp topology macro and an example tplg for
apl pcm512x.

# PCM0 --> buf --> volume --> Smart AMP --> buf --> SSP5 (pcm512x)
#                                ^
#                                |
#                               buf
#                                ^
#                                |
# PCM0 <-- buf <-- volume <-- Smart AMP --< buf <-- SSP5 (pcm512x)

Signed-off-by: Pan Xiuli xiuli.pan@linux.intel.com

[xiulipan]

@bkokoszx Add a volume comp in the pipeline. Not sure if this is the right way to make the pipeline.
Could you share more detail about how the smart amp is used?

[bkokoszx]

@xiulipan
As I wrote here
#1896 (comment)
there should be no problems with using volume component. Could you share the whole log from tests?

[lgirdwood]

@xiulipan do we need any tokens or ABI update ?

[xiulipan]

@lgirdwood From @bkokoszx and the test result the only token we add was one more string value for SOF_TKN_PROCESS_TYPE . And we will need some parse thesofproject/linux#1343 in Kernel to handle it.
It may be some minor ABI change at most.

[lgirdwood]

@xiulipan ABI labels added, please assign ABI minor to align with kernel.

[zrombel]

Due to PR#2029 merge and CI bit depth conversion tests changes - this PR require rebase.

[lgirdwood]

@xiulipan ping ?

[kv2019i]

@xiulipan ping?

[lgirdwood]

@xiulipan moving to v1.7 and ABI 3.18

[xiulipan]

@lgirdwood Close this as we already have smart amp support and test topology,