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/kernels/NEBox3x3Kernel.h b/arm_compute/core/NEON/kernels/NEBox3x3Kernel.h
index 9c13955..2f93fd2 100644
--- a/arm_compute/core/NEON/kernels/NEBox3x3Kernel.h
+++ b/arm_compute/core/NEON/kernels/NEBox3x3Kernel.h
@@ -51,7 +51,7 @@
 };
 
 #ifdef __ARM_FEATURE_FP16_VECTOR_ARITHMETIC
-/** NEON kernel to perform a Box 3x3 filter using F16 simd
+/** NEON kernel to perform a Box 3x3 filter for FP16 datatype
  */
 class NEBox3x3FP16Kernel : public NEBox3x3Kernel
 {
@@ -64,6 +64,7 @@
     void run(const Window &window, const ThreadInfo &info) override;
 };
 #else  /* __ARM_FEATURE_FP16_VECTOR_ARITHMETIC */
+/** NEON kernel to perform a Box 3x3 filter for FP16 datatype */
 using NEBox3x3FP16Kernel = NEBox3x3Kernel;
 #endif /* __ARM_FEATURE_FP16_VECTOR_ARITHMETIC */
 } // namespace arm_compute