ASoC: wm_adsp: Split out struct cs_dsp from struct wm_adsp

In preparation for moving the generic DSP support out of ASoC split
struct wm_adsp into two parts, one will form the structure for the new
generic DSP code and embed that one into wm_adsp.

Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com>
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20210913160057.103842-15-simont@opensource.cirrus.com


Signed-off-by: Mark Brown <broonie@kernel.org>