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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>