ASoC: qcom: apq8016_sbc: Add SEC_MI2S support

This patch adds external codec support on secondary mi2s.
It is used for headphones on some devices, eg. alcatel-idol347.

Signed-off-by: Vincent Knecht <vincent.knecht@mailoo.org>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20210806114116.895473-1-vincent.knecht@mailoo.org


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