ASoC: Intel: sof_es8336: fix headphone GPIO logic inversion

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 <tgaraev653@gmail.com>
Link: https://patch.msgid.link/20260121152435.101698-1-tgaraev653@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>