[Quantization] import torch.fx only if torch.__version__ >= 1.8

wanchen.swc

2023-03-30 0438b966d6d9ef89fdd7a8d112d6e03b34122b1e

1
2
3
4
5
6
7
8
9
10
11
12
january
february
march
april
may
june
july
august
september
october
november
december