ASoC: codecs: msm8916-wcd-digital: add CIC filter source selection path

This patch fixes a missing selection of DMIC in CIC filter source path
to dapm route. Without this patch dmic is not functional.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>