iommu/iommu-logger: Log IOMMU client name in debug structures

Log IOMMU client name in debug structures so that tools can
directly read the IOMMU client name without having to access
other structures outside of the IOMMU debug attachments structure.

Change-Id: I36c13fd63e6ca7260b69d01573126e276eb5835b
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>