ASoC: codecs: Add NeoFidelity NTP8918 codec

The NeoFidelity NTP8918 is a two channel amplifier with mixer and
biquad filters.

Datasheet: https://datasheetspdf.com/pdf-down/N/T/P/NTP8918-NeoFidelity.pdf


Signed-off-by: Igor Prusov <ivprusov@salutedevices.com>
Link: https://patch.msgid.link/20240925-ntp-amps-8918-8835-v3-4-e2459a8191a6@salutedevices.com


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