iommu/arm-smmu: Add support for driver IOMMU fault handlers

Call report_iommu_fault() to allow upper-level drivers to register their
own fault handlers.

Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Acked-by: Will Deacon <will@kernel.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210610214431.539029-2-robdclark@gmail.com
Signed-off-by: Rob Clark <robdclark@chromium.org>