drm/xe: Add dbg messages on the suspend resume functions.

In case of the suspend/resume flow getting locked up we
can get reports with some useful hints on where it might
get locked and if that has failed.

Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240318180141.267458-2-rodrigo.vivi@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>