fix loss normalization for ddp training

haoneng.lhn

2023-12-07 4152cf4615e234b9892703a8e088cdd51937fc13

 funasr/models/specaug/abs_specaug.py

@@ -6,9 +6,7 @@

class AbsSpecAug(torch.nn.Module):
    """Abstract class for the augmentation of spectrogram

    The process-flow:

    Frontend  -> SpecAug -> Normalization -> Encoder -> Decoder
    """