COMPMID-418 Add check and fix comments after preprocessor conditions

Change-Id: I1353fd652ee180e3931e58b4ce13d651a48c7e2c
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/79567
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Moritz Pflanzer <moritz.pflanzer@arm.com>
diff --git a/src/core/NEON/kernels/NEGEMMMatrixAdditionKernel.cpp b/src/core/NEON/kernels/NEGEMMMatrixAdditionKernel.cpp
index 7d659ab..57d2807 100644
--- a/src/core/NEON/kernels/NEGEMMMatrixAdditionKernel.cpp
+++ b/src/core/NEON/kernels/NEGEMMMatrixAdditionKernel.cpp
@@ -89,7 +89,7 @@
     },
     in, out);
 }
-#endif
+#endif /* ARM_COMPUTE_ENABLE_FP16 */
 
 void matrix_addition_qs8(const ITensor *input, ITensor *output, const Window &window, float beta)
 {
@@ -142,7 +142,7 @@
 #ifdef ARM_COMPUTE_ENABLE_FP16
             _func = &matrix_addition_f16;
             break;
-#endif
+#endif /* ARM_COMPUTE_ENABLE_FP16 */
         default:
             ARM_COMPUTE_ERROR("Data type not supported");
             break;