drm/xe: Define XE_REG_OPTION_VF

We will tag registers that SR-IOV Virtual Functions can access.
This will help us catch any invalid usage and/or provide custom
replacement if available.

Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240314173130.1177-3-michal.wajdeczko@intel.com


Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>