iommu: arm-smmu: Implement eCATS translation fault errata workaround

Currently due to hardware issue, eCATS reports a false positive
translation fault error. Instead of relying on eCATS fault status,
check the context bank specific Fault Status Register (FSR) for
translation faults.

Change-Id: I1920b69404b8bc2d10f84c6a4f4e30977fff45ab
Signed-off-by: Sudarshan Rajagopalan <sudaraja@codeaurora.org>