drm/xe/sriov: Mark BMG as SR-IOV capable

drm/xe/sriov: Mark BMG as SR-IOV capable

Enable SR-IOV support for BMG platforms. Note that as other flags from
the platform descriptor, it only means it may have that capability: it
still depends on runtime checks for the proper support in HW and
firmware.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Tested-by: Jakub Kolakowski <jakub1.kolakowski@intel.com>
Signed-off-by: Jakub Kolakowski <jakub1.kolakowski@intel.com>
Reviewed-by: Satyanarayana K V P <satyanarayana.k.v.p@intel.com>
Link: https://lore.kernel.org/r/20250710103040.375610-3-jakub1.kolakowski@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>