ASoC: samsung: s3c24xx-i2s: Drop unneeded gpio.h include

The module does not use anything from gpio.h header.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220627143412.477226-2-krzysztof.kozlowski@linaro.org


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