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Pre-production hardware is anything before C0 (for DG2-G10), before B1
(for DG2-G11), or before A1 (for DG2-G12).  Workarounds specific to such
hardware was already removed from i915 in commit eaeb4b36


("drm/i915/dg2: Drop pre-production GT workarounds") and there's even
less value keeping these around in the Xe driver.

v2:
 - Drop Wa_14011441408 from xe_mocs.c.  (Gustavo)
 - Drop Wa_14010648519, Wa_14010198302, and Wa_1608949956 which were
   mis-implemented; they were only supposed to apply to early steppings
   of DG2-G10, but were being applied unconditionally on all DG2.
   (Gustavo)
 - Drop reference to Wa_16011620976; the implementation stays because it
   still matches Wa_22015475538.  (Gustavo)

Cc: Gustavo Sousa <gustavo.sousa@intel.com>
Reviewed-by: Gustavo Sousa <gustavo.sousa@intel.com>
Link: https://lore.kernel.org/r/20231215214531.2576215-2-matthew.d.roper@intel.com

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>