Add nn.SiLU inplace in attempt_load() (ultralytics#1940)

* sleep 3 sec to load data .

* Update train.py

* Add nn.SiLU inplace in attempt_load()

Co-authored-by: wangliang <wangliang@codingapi.com>
Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>

models/experimental.py

@@ -119,7 +119,7 @@ def attempt_load(weights, map_location=None):
 
     # Compatibility updates
     for m in model.modules():
-        if type(m) in [nn.Hardswish, nn.LeakyReLU, nn.ReLU, nn.ReLU6]:
+        if type(m) in [nn.Hardswish, nn.LeakyReLU, nn.ReLU, nn.ReLU6, nn.SiLU]:
             m.inplace = True  # pytorch 1.7.0 compatibility
         elif type(m) is Conv:
             m._non_persistent_buffers_set = set()  # pytorch 1.6.0 compatibility