ASoC: cs35l56: Make common function for control port wait

Move the waits for CS35L56_CONTROL_PORT_READY_US into a common
function, and also allow a wider range of allowed wait times.

Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com>
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230721132120.5523-9-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>