bnx2x: NULL dereference on error in debug code

"vfop" is NULL here. I've changed the debugging to not use it.

Signed-off-by: Dan Carpenter <[e-mail]>
Acked-by: Ariel Elior <[e-mail]>
Acked-by: Ariel Elior <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c

···
 		return bnx2x_vfop_transition(bp, vf, bnx2x_vfop_qdtor,
 					     cmd->block);
 	}
-	DP(BNX2X_MSG_IOV, "VF[%d] failed to add a vfop. rc %d\n",
-	   vf->abs_vfid, vfop->rc);
+	DP(BNX2X_MSG_IOV, "VF[%d] failed to add a vfop.\n", vf->abs_vfid);
 	return -ENOMEM;
 }