ASoC: wm_adsp: move firmware loading to client

This is preparation for moving the generic DSP support out of ASoC.
Passing the firmware as parameters into the power_up functions
simplifies the generic code that will be moved out of wm_adsp.

Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20210913160057.103842-14-simont@opensource.cirrus.com


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