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/utils/misc/Iterable.h b/arm_compute/core/utils/misc/Iterable.h
index 96a650a..d150111 100644
--- a/arm_compute/core/utils/misc/Iterable.h
+++ b/arm_compute/core/utils/misc/Iterable.h
@@ -49,21 +49,37 @@
     {
     }
 
+    /** Get beginning of iterator.
+     *
+     * @return beginning of iterator.
+     */
     typename T::reverse_iterator begin()
     {
         return _it.rbegin();
     }
 
+    /** Get end of iterator.
+     *
+     * @return end of iterator.
+     */
     typename T::reverse_iterator end()
     {
         return _it.rend();
     }
 
+    /** Get beginning of const iterator.
+     *
+     * @return beginning of const iterator.
+     */
     typename T::const_reverse_iterator cbegin()
     {
         return _it.rbegin();
     }
 
+    /** Get end of const iterator.
+     *
+     * @return end of const iterator.
+     */
     typename T::const_reverse_iterator cend()
     {
         return _it.rend();