add swinv2

ppcls/arch/backbone/model_zoo/swin_transformer_v2.py

@@ -893,7 +893,7 @@ def SwinTransformerV2_base_patch4_window16_256(
         use_imagenet22k_pretrained=False,
         use_imagenet22kto1k_pretrained=False,
         **kwargs):
-    model = SwinTransformerV2(
+     model = SwinTransformerV2(
         img_size=256,
         embed_dim=128,
         depths=[2, 2, 18, 2],
@@ -984,4 +984,4 @@ def SwinTransformerV2_large_patch4_window24_384(
         use_ssld=use_ssld,
         use_imagenet22k_pretrained=use_imagenet22k_pretrained,
         use_imagenet22kto1k_pretrained=use_imagenet22kto1k_pretrained)
-    return model
+    return model
\ No newline at end of file