The IOMMU parser currently only supports short-descriptor format page
tables but hardware supports long-descriptor format page tables. Add
support for the long-descriptor format. Most of the existing LPAE MMU
code can be re-used for this, although it must be refactored a bit.

Change-Id: I464d7edeb8818c0be9de1e1a8224bc9b478eac37

The LPAE MMU code can be re-used for other modules that need page table
parsing (like the LPAE IOMMU page tables). Refactor the code a bit so
that it can be easily re-used later.

Change-Id: I0deb80a69f2fca83c3ddcc78867fa2e5f5d18bb2

do_fl_sl_level_lookup is a class method, so it needs to be called on a
class object. Add some missing `self' class objects.

Change-Id: I8b9932ec2bd2eb7c2296355afff4783612171c7d

MMU.virt_to_phys currently lacks a docstring. They're useful, so add
one.

Change-Id: I95b0a7a8f97912f178157eb4b68c453585e547bd

Ram dumps are now being generated for 64-bit ramdumps. Update the
parser to account for this.

Change-Id: I54a354f39701ad96dd7b81010ec6c5989dd471ad

When adding a new board, it can be non-obvious what went wrong if the
board is not immediately detected. Add an option to trace through
socinfo addresses for a specific board to print out useful addresses
as a debugging aid. Also clean up some error handling, mostly among
the tracing code.

Change-Id: I65f4a38b95912b81676f44cd371751abc96aae9e

After a crash, ramdumps may be collected for analysis. The ram
parser is a tool to aid in analysis of these dumps. The script
extracts useful information from the dumps to help with debugging.
Please see the README for full details.

Change-Id: I7795686a96bbfe246edf47d09e3f616131688429