ASoC: cs35l56: Patch soft registers to defaults

ASoC: cs35l56: Patch soft registers to defaults

The soft (firmware) registers for volume/mute/posture are not reset by
a chip soft-reset, so use a regmap patch to set them to defaults.

cs35l56_reread_firmware_registers() has been removed. Its intent was to
use whatever the firmware set as a default. But the driver now patches the
defaults to the registers.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230718144625.39634-1-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>