arm64: dts: qcom: sc7180: Set performance state for audio

Set a performance state for audio clks so that the minimally
correct corner voltage is picked when audio is active.

Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@quicinc.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/1670932566-22923-1-git-send-email-quic_srivasam@quicinc.com