ASoC: codecs: ES8326: Adding new volume kcontrols

ES8326 features a headphone volume control register and four DAC
volume control registers.
We add new volume Kcontrols for these registers to enhance the
configurability of the volume settings, providing users with
greater flexibility.

Signed-off-by: Zhu Ning <zhuning0077@gmail.com>
Link: https://msgid.link/r/20240124064806.30511-2-zhuning0077@gmail.com


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