ASoC: samsung: h1940_uda1380: Remove unused variable

Fixes the following warning:
sound/soc/samsung/h1940_uda1380.c:183:6: warning: unused variable ‘err’ [-Wunused-variable]

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>