dt-bindings: arm-smmu: Add binding for SDX65 SMMU

Add devicetree binding for Qualcomm SDX65 SMMU.

Signed-off-by: Rohit Agarwal <quic_rohiagar@quicinc.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/1649670615-21268-5-git-send-email-quic_rohiagar@quicinc.com


Signed-off-by: Will Deacon <will@kernel.org>