drm/i915/display/fbc: Do not apply WA 22014263786 to DG2

This workaround brings some regressions to DG2 and if really necessary
for DG2 an alternative workaround will be implemented.

BSpec: 54077
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220602201730.199418-1-jose.souza@intel.com