Add PSIMD DWCONV 5x5s2 kernel.

Add existing kernels to init.c

PiperOrigin-RevId: 316105974
diff --git a/src/xnnpack/dwconv.h b/src/xnnpack/dwconv.h
index 5aee67d..74a5aca 100644
--- a/src/xnnpack/dwconv.h
+++ b/src/xnnpack/dwconv.h
@@ -271,6 +271,7 @@
 DECLARE_F32_DWCONV_CHW_UKERNEL_FUNCTION(xnn_f32_dwconv_chw_ukernel_5x5s2p2__scalar)
 DECLARE_F32_DWCONV_CHW_UKERNEL_FUNCTION(xnn_f32_dwconv_chw_ukernel_3x3p1__psimd)
 DECLARE_F32_DWCONV_CHW_UKERNEL_FUNCTION(xnn_f32_dwconv_chw_ukernel_3x3s2p1__psimd)
+DECLARE_F32_DWCONV_CHW_UKERNEL_FUNCTION(xnn_f32_dwconv_chw_ukernel_5x5p2__psimd)
 DECLARE_F32_DWCONV_CHW_UKERNEL_FUNCTION(xnn_f32_dwconv_chw_ukernel_3x3p1__neonfma)
 DECLARE_F32_DWCONV_CHW_UKERNEL_FUNCTION(xnn_f32_dwconv_chw_ukernel_3x3s2p1__neonfma)
 DECLARE_F32_DWCONV_CHW_UKERNEL_FUNCTION(xnn_f32_dwconv_chw_ukernel_5x5p2__neonfma)