arm64: dts: qcom: x1e80100-romulus: Configure audio

The Laptop 7 features a single pair of speakers and an equal amount of
digital mics.

Add the required nodes to support audio playback and recording.

Signed-off-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20241129-topic-sl7_feat2-v2-1-fb6cf5660cfc@oss.qualcomm.com


Signed-off-by: Bjorn Andersson <andersson@kernel.org>