ASoC: wm8782: Constrain maximum audio rate at runtime

The wm8782 supports up to 192kHz audio when pins are set correctly.
Instead of hardcoding which rates are supported constrain them at
runtime based on a max_rate variable.

Signed-off-by: John Watts <contact@jookia.org>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230918131532.2257615-2-contact@jookia.org


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