arm64: dts: qcom: sm8450: add smmu nodes

Add the apps smmu node as found in the SM8450 SoC

Signed-off-by: Vinod Koul <vkoul@kernel.org>
Acked-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211215043440.605624-5-vkoul@kernel.org