fix diff in dequantize op between cpu and gpu test=develop (#20953)
fix diff in dequantize op between cpu and gpu test=develop (#20953)


luotao1/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,luotao1/Paddle,PaddlePaddle/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,luotao1/Paddle,PaddlePaddle/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,PaddlePaddle/Paddle