COMPMID-1008: Fix Doxygen issues

Change-Id: Ie73d8771f85d1f5b059f3a56f1bbd73c98e94a38
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/124723
Reviewed-by: Michalis Spyrou <michalis.spyrou@arm.com>
Tested-by: Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/core/NEON/wrapper/traits.h b/arm_compute/core/NEON/wrapper/traits.h
index 08b2c9b..495ddbb 100644
--- a/arm_compute/core/NEON/wrapper/traits.h
+++ b/arm_compute/core/NEON/wrapper/traits.h
@@ -42,7 +42,8 @@
 
 /** Create the appropriate NEON vector given its type and size */
 template <typename T, int S> struct neon_vector;
-/** Specializations */
+// Specializations
+#ifndef DOXYGEN_SKIP_THIS
 template <> struct neon_vector<uint8_t, 8>{ using type = uint8x8_t; using tag_type = vector_64_tag; };
 template <> struct neon_vector<int8_t, 8>{ using type = int8x8_t; using tag_type = vector_64_tag; };
 template <> struct neon_vector<uint8_t, 16>{ using type = uint8x16_t; using tag_type = vector_128_tag; };
@@ -61,6 +62,7 @@
 template <> struct neon_vector<int64_t, 2>{ using type = int64x2_t; using tag_type = vector_128_tag; };
 template <> struct neon_vector<float_t, 2>{ using type = float32x2_t; using tag_type = vector_64_tag; };
 template <> struct neon_vector<float_t, 4>{ using type = float32x4_t; using tag_type = vector_128_tag; };
+#endif /* DOXYGEN_SKIP_THIS */
 
 /**  Helper type template to get the type of a neon vector */
 template <typename T, int S> using neon_vector_t = typename neon_vector<T, S>::type;