[ConvertToHLS] make 1D SWG kernel check more constrained

src/finn/transformation/fpgadataflow/convert_to_hls_layers.py

@@ -213,10 +213,11 @@ class InferConvInpGen(Transformation):
                                 1D depthwise separable convolutions"""
                                 % n.name
                             )
-                        if stride_h > 1 or stride_w > 1:
+                        if (stride_h > 1 or stride_w > 1) and (not depthwise):
                             assert (
                                 stride_h < k_h and stride_w < k_w
-                            ), """%s: Stride value must be smaller than kernel dim"""
+                            ), """%s: Stride value must be smaller than kernel dim
+                            for non-depthwise (dense) convolutions"""
                         ConvInpGen_node = helper.make_node(
                             "ConvolutionInputGenerator1D",
                             [ConvInpGen_input],