ASoC: rk3399_gru_sound: Wire up DP jack detection

Now that the cdn-dp driver supports plug-change callbacks, let's wire it
up.

Signed-off-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20220114150129.v2.3.I3c79b1466c14b02980071221e5b99283cd26ec77@changeid


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