ASoC: rt5640: Fix IRQ not being free-ed for HDA jack detect mode

Set "rt5640->irq_requested = true" after a successful request_irq()
in rt5640_enable_hda_jack_detect(), so that rt5640_disable_jack_detect()
properly frees the IRQ.

This fixes the IRQ not being freed on rmmod / driver unbind.

Fixes: 2b9c8d2b ("ASoC: rt5640: Add the HDA header support")
Cc: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20230912113245.320159-6-hdegoede@redhat.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt5640.c

@@ -2625,6 +2625,7 @@ static void rt5640_enable_hda_jack_detect(
 		rt5640->jack = NULL;
 		return;
 	}
+	rt5640->irq_requested = true;
 
 	/* sync initial jack state */
 	queue_delayed_work(system_long_wq, &rt5640->jack_work, 0);