ASoC: samsung: s3c-i2s-v2: Allow build for unsupported hardware

There is no particular need to restrict building of S3C I2S driver to
supported platforms within the C unit, because Kconfig does it.
Removing such restricting #ifdef from s3c-i2s-v2 allows compile testing
it on other platforms.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220627143412.477226-1-krzysztof.kozlowski@linaro.org


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