drm/xe/vf: Custom GuC reset

The VF drivers can't trigger real GuC firmware reset using GDRST
register, but for the VF drivers it is sufficient to send VF_RESET
message to reset any VF specific state maintained by the GuC.
Use our existing VF bootstrap function as VF_RESET is part of it.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240604212231.1416-4-michal.wajdeczko@intel.com

drivers/gpu/drm/xe/xe_guc.c

@@ -430,6 +430,9 @@ int xe_guc_reset(struct xe_guc *guc)
 
 	xe_force_wake_assert_held(gt_to_fw(gt), XE_FW_GT);
 
+	if (IS_SRIOV_VF(gt_to_xe(gt)))
+		return xe_gt_sriov_vf_bootstrap(gt);
+
 	xe_mmio_write32(gt, GDRST, GRDOM_GUC);
 
 	ret = xe_mmio_wait32(gt, GDRST, GRDOM_GUC, 0, 5000, &gdrst, false);