完成汽车用HITAG2加密方式，用verilog完成-Completed the automotive HITAG2 encryption completed, with verilog

使用verilog语言实现HITAG2加密算法的实现，即硬件实现 已经验证与C语言结果一致-Use the verilog language HITAG2 encryption algorithm realization that the hardware implementation