ASoC: dt-bindings: audio-graph-card2: add widgets and hp-det-gpios support

ASoC: dt-bindings: audio-graph-card2: add widgets and hp-det-gpios support

Introduce the 'widgets' property, allowing the creation of widgets from
4 template widgets: Microphone, Line, Headphone, and Speaker. Also
introduce the 'hp-det-gpios' property, which allows using headphone
detection using the specified GPIO.

Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Iuliana Prodan <iuliana.prodan@nxp.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Link: https://patch.msgid.link/20250311163255.2664-3-laurentiumihalcea111@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>