iommu/arm-smmu: add DT option to make address size faults fatal

Some hardware requires special fixups to recover from address size
faults.  Rather than applying the fixups add an option to just BUG since
address size faults are due to a fundamental programming error from
which we don't care about recovering anyways.

Change-Id: Ibb70e4ec00683562dae9f3239b286daa5deabd45
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>