ASoC: codecs: pcm1754: add pcm1754 dac driver

ASoC: codecs: pcm1754: add pcm1754 dac driver

The Texas Instruments PCM1754[1] is a simple stereo DAC without any
digital
management interface but soft mute, PCM input format and 44.1 kHz
digital de-emphasis can be configured via strapping pins. Only soft mute
and PCM input format selection is currently exposed via optional GPIOs
in the driver.

[1]: https://www.ti.com/product/PCM1754

Signed-off-by: Alvin Šipraga <alsi@bang-olufsen.dk>
Co-developed-by: Stefan Kerkmann <s.kerkmann@pengutronix.de>
Signed-off-by: Stefan Kerkmann <s.kerkmann@pengutronix.de>
Link: https://patch.msgid.link/20250910-v6-12-topic-pcm1754-v2-2-0917dbe73c65@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>