ASoC: codecs: tx-macro: add dmic support via tx macro

DMIC Paths into LPASS digital codec can go via tx-macro or va-macro codec, add
support to tx-macro path as va-macro path is already supported.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20221115065430.4126-1-srinivas.kandagatla@linaro.orgSigned-off-by: Mark Brown <broonie@kernel.org>