ASoC: sun4i-codec: support hp-det-gpios property

Add support for GPIO headphone detection with the hp-det-gpios
property. In order for this to properly disable the path upon
removal of headphones, the output must be labelled Headphone which
is a common sink in the driver.

Describe a headphone jack and detection GPIO in the driver, check for
a corresponding device tree node, and enable jack detection in a new
machine init function if described.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>

--
Changelog v1..v2:
- Separate DAPM changes into separate patch and add rationale.

Tested-by: Philippe Simons <simons.philippe@gmail.com>
Link: https://patch.msgid.link/20250214220247.10810-4-ryan@testtoast.com


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