iommu/arm-smmu: Add support for implementation specific debugging

Certain SMMU implementation, such as the QSMMUV500 model, have
hardware that can be used to collect information that is useful
for debugging adversarial scenarios, such as TLB sync timeouts.

Add support for collecting information for debugging TLB sync
timeouts, as well as triggering the SMMU HW to perform a
translation for verification purpose, and wire up the QSMMUV500
implementations of these hooks. In doing so, there are no
users of the iova_to_phys_hard() and tlb_sync_timeout() hooks
in the arm_smmu_arch_ops structure, so remove these fields.

Change-Id: I61df57e82f3058a7e8a09f4df1fe147a71ae2fc3
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>