arm64: dts: qcom: sm8250: Add qcom,smmu-500 to Adreno SMMU

Add the fallback Qualcomm SMMU500 compatible to the Adreno SMMU.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230216145646.4095336-4-konrad.dybcio@linaro.org