ASoC: codec: es8316: "DAC Soft Ramp Rate" is just a 2 bit control

Max value should be 3, otherwise "DAC Soft Ramp Switch" will be
overwritten by this control.

Signed-off-by: Ondrej Jirman <megi@xff.cz>
Link: https://patch.msgid.link/20250127150458.1489425-1-megi@xff.cz


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