Custom # of channels from new PR not working

[s-rog]

EfficientNet.from_pretrained("efficientnet-b{}".format(bN),
                                               num_classes=6,
                                               in_channels=channels)

TypeError: from_pretrained() got an unexpected keyword argument 'in_channels'

might have to do with the fact that there are 2 from_pretrained() methods? not exactly sure

Edit: I made some changes in my fork, will post a PR once I have time to test it

[s-rog]

#94 Fixed this issue and tweaked from_name as well