On older platforms (12.00) the PF driver must explicitly unblock
VF's modifications to the GGTT. On newer platforms this capability
is enabled by default.

Bspec: 49908, 53204
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240425143927.2265-1-michal.wajdeczko@intel.com