ASoC: Intel: sof_es8336: fix headphone GPIO logic inversion

The headphone GPIO should be set to the inverse of speaker_en.
When speakers are enabled, headphones should be disabled and vice versa.

Currently both GPIOs are set to the same value (speaker_en), causing
audio to play through both speakers and headphones simultaneously
when headphones are plugged in.

Tested on Huawei Matebook (BOD-WXX9) with ES8336 codec.

Fixes: 6e1ff1459e00 ("ASoC: Intel: sof_es8336: support a separate gpio to control headphone")
Signed-off-by: Tagir Garaev <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

sound/soc/intel/boards/sof_es8336.c

···
 	gpiod_set_value_cansleep(priv->gpio_speakers, priv->speaker_en);
 
 	if (quirk & SOF_ES8336_HEADPHONE_GPIO)
-		gpiod_set_value_cansleep(priv->gpio_headphone, priv->speaker_en);
+		gpiod_set_value_cansleep(priv->gpio_headphone, !priv->speaker_en);
 
 }