iommu: msm: Refactor printing of page fault

Refactor the code that reads the registers during an IOMMU
page fault to make the code more maintainable and make it
easier to add support for new registers.

Change-Id: I6437754ee372a03344b307554e1e3a51dc810ddb
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
3 files changed