ASoC: Adds support for TAS575x to the pcm512x driver

ASoC: Adds support for TAS575x to the pcm512x driver

Enables the existing pcm512x driver to control the almost
compatible TAS5754 and -76 amplifers. Both amplifiers support
only an I2C interface and the internal PLL must be always
on to provide necessary clocks to the amplifier section.
Tested on TAS5756 with support from Andreas Arbesser-Krasser
from Texas Instruments <a-krasser@ti.com>

Signed-off-by: Joerg Schambacher <joerg.hifiberry@gmail.com>
Link: https://lore.kernel.org/r/20230929150722.405415-1-joerg.hifiberry@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>