[Fix] Fix several config file errors in 2.0 (New) (#1994)

...v1/bisenetv1_r101-d32_4xb4-160k_coco-stuff164k-512x512.py

...tv1/bisenetv1_r18-d32_4xb4-160k_coco-stuff164k-512x512.py

...tv1/bisenetv1_r50-d32_4xb4-160k_coco-stuff164k-512x512.py

...abv3plus/deeplabv3plus_r101-d8_4xb4-80k_loveda-512x512.py

...labv3plus/deeplabv3plus_r18-d8_4xb4-80k_loveda-512x512.py

configs/hrnet/fcn_hr18s_4xb4-80k_loveda-512x512.py

configs/hrnet/fcn_hr48_4xb4-80k_loveda-512x512.py

configs/pspnet/pspnet_r101-d8_4xb4-80k_loveda-512x512.py

configs/pspnet/pspnet_r18-d8_4xb4-80k_loveda-512x512.py

...w12-in22k-384x384-pre_upernet_8xb2-160k_ade20k-512x512.py

...ch4-window7-in22k-pre_upernet_8xb2-160k_ade20k-512x512.py

configs/upernet/upernet_r18_4xb2-40k_cityscapes-512x1024.py

configs/upernet/upernet_r18_4xb2-80k_cityscapes-512x1024.py

configs/upernet/upernet_r18_4xb4-160k_ade20k-512x512.py

configs/upernet/upernet_r18_4xb4-20k_voc12aug-512x512.py

configs/upernet/upernet_r18_4xb4-40k_voc12aug-512x512.py

configs/upernet/upernet_r18_4xb4-80k_ade20k-512x512.py