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iommu: Add domain attribute to make faults non-fatal
During development, any IOMMU faults most likely need to be debugged
immediately. Allowing the system to continue to run has a tendency to
mask the original problem, which makes debugging more difficult. Some
drivers might want to make all faults fatal by default, unless
explicitly requested otherwise by a client. Add a domain attribute for
this.
Change-Id: I454b143ea3cae1f3de36e0888afd15936aa63ce1
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>