drm/xe/vf: Custom hardware config load step if VF

The VF drivers may immediately communicate with the GuC to obtain
the hardware config since the firmware shall already be running.

With the GuC communication established, VFs can also obtain the
values of the runtime registers (fuses) from the PF driver.

Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240516110546.2216-6-michal.wajdeczko@intel.com