AddBiasOp does not care num_flatten_dims (#5200)
AddBiasOp does not care num_flatten_dims (#5200)

* AddBiasOp does not care num_flatten_dims

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lcy-seso/Paddle,putcn/Paddle,PaddlePaddle/Paddle,lcy-seso/Paddle,baidu/Paddle,baidu/Paddle,putcn/Paddle,reyoung/Paddle,putcn/Paddle,Canpio/Paddle,PaddlePaddle/Paddle,Canpio/Paddle,chengduoZH/Paddle,Canpio/Paddle,QiJune/Paddle,pkuyym/Paddle,chengduoZH/Paddle,luotao1/Paddle,QiJune/Paddle,luotao1/Paddle,tensor-tang/Paddle,pkuyym/Paddle,PaddlePaddle/Paddle,Canpio/Paddle,luotao1/Paddle,PaddlePaddle/Paddle,tensor-tang/Paddle,lcy-seso/Paddle,tensor-tang/Paddle,lcy-seso/Paddle,jacquesqiao/Paddle,Canpio/Paddle,chengduoZH/Paddle,pkuyym/Paddle,QiJune/Paddle,reyoung/Paddle,jacquesqiao/Paddle,jacquesqiao/Paddle,QiJune/Paddle,chengduoZH/Paddle,luotao1/Paddle,putcn/Paddle,Canpio/Paddle,lcy-seso/Paddle,putcn/Paddle,jacquesqiao/Paddle,Canpio/Paddle,reyoung/Paddle,tensor-tang/Paddle,QiJune/Paddle,pkuyym/Paddle,pkuyym/Paddle,lcy-seso/Paddle,tensor-tang/Paddle,reyoung/Paddle,jacquesqiao/Paddle,reyoung/Paddle,reyoung/Paddle,Canpio/Paddle,baidu/Paddle,PaddlePaddle/Paddle,putcn/Paddle,chengduoZH/Paddle,pkuyym/Paddle,QiJune/Paddle,luotao1/Paddle,jacquesqiao/Paddle,baidu/Paddle,PaddlePaddle/Paddle,baidu/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,luotao1/Paddle