drm/xe: Add mem_region to properties line in VM snapshot capture

drm/xe: Add mem_region to properties line in VM snapshot capture

Add memory region to properties line in VM snapshot capture indicating
where the memory is located. The memory region corresponds to regions in
the uAPI. This is useful information for debug and will help build a
robust GPU hang replay tool.

The current format is:

[<vma address>]: <permissions>|<type>|mem_region=0x%x

Permissions has two options, either "read_only" or "read_write".

Type has three options, either "userptr", "null_sparse", or "bo".

Memory region is a bit mask of where the memory is located.

Cc: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Link: https://patch.msgid.link/20251126185952.546277-4-matthew.brost@intel.com