arm64: dts: qcom: sm6115: Add smp2p nodes

Add the adsp, cdsp and modem smp2p nodes to sm6115.

Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230121200454.1423567-1-bhupesh.sharma@linaro.org