arm64: dts: qcom: qrb5165-rb5: Add Audio support

This patch add support for two WSA881X smart speakers attached via Soundwire
and a DMIC0 on the main board.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Tested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20201202180741.16386-7-srinivas.kandagatla@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>