COMPMID-421: Update NEArithmeticAdditionKernel documentation.

Change-Id: I4979a5d472384706d643879b6b1064313e31eee7
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/80685
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
diff --git a/arm_compute/core/NEON/kernels/NEArithmeticAdditionKernel.h b/arm_compute/core/NEON/kernels/NEArithmeticAdditionKernel.h
index 7ad5893..e28ad67 100644
--- a/arm_compute/core/NEON/kernels/NEArithmeticAdditionKernel.h
+++ b/arm_compute/core/NEON/kernels/NEArithmeticAdditionKernel.h
@@ -50,9 +50,21 @@
 
     /** Initialise the kernel's input, output and border mode.
      *
+     * Valid configurations (Input1,Input2) -> Output :
+     *
+     *   - (U8,U8)     -> U8
+     *   - (QS8,QS8)   -> QS8
+     *   - (U8,U8)     -> S16
+     *   - (S16,U8)    -> S16
+     *   - (U8,S16)    -> S16
+     *   - (S16,S16)   -> S16
+     *   - (QS16,QS16) -> QS16
+     *   - (F16,F16)   -> F16
+     *   - (F32,F32)   -> F32
+     *
      * @param[in]  input1 An input tensor. Data types supported: U8/QS8/QS16/S16/F16/F32
-     * @param[in]  input2 An input tensor. Data types supported: U8, QS8 (only if @p input1 is QS8), QS16 (only if @p input1 is QS16), S16/F16 (only if @p input1 is F16), F32 (only if @p input1 is F32).
-     * @param[out] output The output tensor. Data types supported: U8 (Only if both inputs are U8), QS8 (only if both inputs are QS8), QS16 (only if both inputs are QS16), S16/F16 (only if @p input1 is F16), F32 (only if both inputs are F32).
+     * @param[in]  input2 An input tensor. Data types supported: U8/QS8/QS16/S16/F16/F32
+     * @param[out] output The output tensor. Data types supported: U8/QS8/QS16/S16/F16/F32.
      * @param[in]  policy Overflow policy.
      */
     void configure(const ITensor *input1, const ITensor *input2, ITensor *output, ConvertPolicy policy);
@@ -64,8 +76,8 @@
     /** Common signature for all the specialised add functions
      *
      * @param[in]  input1 An input tensor. Data types supported: U8/QS8/QS16/S16/F16/F32
-     * @param[in]  input2 An input tensor. Data types supported: U8, QS8 (only if @p input1 is QS8), QS16 (only if @p input1 is QS16), S16/F16 (only if @p input1 is F16), F32 (only if @p input1 is F32).
-     * @param[out] output The output tensor. Data types supported: U8 (Only if both inputs are U8), QS8 (only if both inputs are QS8), QS16 (only if both inputs are QS16), S16/F16 (only if @p input1 is F16), F32 (only if both inputs are F32).
+     * @param[in]  input2 An input tensor. Data types supported: U8/QS8/QS16/S16/F16/F32
+     * @param[out] output The output tensor. Data types supported: U8/QS8/QS16/S16/F16/F32.
      * @param[in]  window Region on which to execute the kernel.
      */
     using AddFunction = void(const ITensor *input1, const ITensor *input2, ITensor *output, const Window &window);