[FEATURE] ADD SUPPORT DeepSeek-V2

[Xu-Chen]

DeepSeek-V2: A Strong, Economical, and Efficient Mixture-of-Experts Language Model

https://huggingface.co/deepseek-ai/DeepSeek-V2-Chat

[robert-lee2016]

I attempt to quan the deepseek-v2-lite. throw the error： “auto_gptq/nn_modules/qlinear/qlinear_exllama.py", line 64, in init
assert infeatures % self.group_size == 0
AssertionError”