drm/xe: Add missing DG2 gt workarounds and tunings

Synchronize with i915 the DG2 gt workarounds as of
commit 4d14d771

 ("drm/i915/selftest: Fix ktime_get() and h/w access
order").

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://lore.kernel.org/r/20230314003012.2600353-9-lucas.demarchi@intel.com


Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>