arm64: dts: qcom: sc7180: Add lpass cpu node for I2S driver

arm64: dts: qcom: sc7180: Add lpass cpu node for I2S driver

Add the I2S controller node to sc7180 dtsi.
Add pinmux for primary and secondary I2S.

Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Ajit Pandey <ajitp@codeaurora.org>
Signed-off-by: Cheng-Yi Chiang <cychiang@chromium.org>
Signed-off-by: V Sujith Kumar Reddy <vsujithk@codeaurora.org>
Signed-off-by: Srinivasa Rao Mandadapu <srivasam@codeaurora.org>
Link: https://lore.kernel.org/r/1600450426-14063-1-git-send-email-srivasam@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>