ASoC: wm_adsp: Move sys_config_size to wm_adsp

sys_config_size is part of the compressed stream support, move it from
what will become generic DSP code so that it remains in ASoC.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20210913160057.103842-10-simont@opensource.cirrus.com


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