iommu/arm-smmu-qcom: Add SC8280XP support

Add the Qualcomm SC8280XP platform to the list of compatible for which
the Qualcomm-impl of the ARM SMMU should apply.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220503163429.960998-3-bjorn.andersson@linaro.org
Signed-off-by: Will Deacon <will@kernel.org>
