ASoC: samsung: bells: Drop unused include

This file does not use the symbols from the legacy
<linux/gpio.h> header, so let's drop it.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://patch.msgid.link/20250303-samsung-codecs-v1-1-56a2299dd928@linaro.org


Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>