dt-bindings: arm-smmu: Add compatible for Qualcomm SM6115

Add compatible for the Qualcomm SM6115 platform to the ARM SMMU
DeviceTree binding.

Signed-off-by: Adam Skladowski <a39.skl@gmail.com>
Signed-off-by: Iskren Chernev <iskren.chernev@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20221030094258.486428-5-iskren.chernev@gmail.com


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