dai: intel: dmic: Move definitions of nhlt structures to a new file

Definitions of a configuration blob structures were separated from the main
drivers header file and moved to a dedicated file to improve code
readability. Removed unnecessary nhlt_pdm_fir_coeffs structure.
The nhlt_pdm_ctrl_cfg structure was extended with nhlt_pdm_ctrl_fir_cfg
and fir coefficients.

Signed-off-by: Adrian Warecki <adrian.warecki@intel.com>