MobilenetV4: add two more lightweight models

Mobilenetv4 is very fast and ideal for embedded devices. However, for many low-cost, low-power embedded MCU devices, smaller models are required. Hopefully this PR will merge.

Author: baorepo

timm/models/mobilenetv3.py

@@ -1253,6 +1253,21 @@ def lcnet_150(pretrained: bool = False, **kwargs) -> MobileNetV3:
     return model
 
 
+@register_model
+def mobilenetv4_conv_small_025(pretrained: bool = False, **kwargs) -> MobileNetV3:
+    """ MobileNet V4 """
+    model = _gen_mobilenet_v4('mobilenetv4_conv_small', 0.25, pretrained=pretrained, **kwargs)
+    return model
+
+
+@register_model
+def mobilenetv4_conv_small_050(pretrained: bool = False, **kwargs) -> MobileNetV3:
+    """ MobileNet V4 """
+    model = _gen_mobilenet_v4('mobilenetv4_conv_small', 0.50, pretrained=pretrained, **kwargs)
+    return model
+
+
+
 @register_model
 def mobilenetv4_conv_small(pretrained: bool = False, **kwargs) -> MobileNetV3:
     """ MobileNet V4 """