ARM: dts: qcom: sdx65: Add spmi node

Add SPMI node to SDX65 dtsi.

Signed-off-by: Rohit Agarwal <quic_rohiagar@quicinc.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1647411447-25249-2-git-send-email-quic_rohiagar@quicinc.com