dsp: Revert featurization of 32 channel support in DSP

Remove the dependency on dedicated config flag for the
use of new API versions in ASM and ADM open commands.
Dependency is now on ADSP service version only.

Change-Id: I2e7bcec675bafb9ad9e2a10df4ccc1e52bb72c92
Signed-off-by: Dieter Luecking <dieterl@codeaurora.org>