COMPMID-444: Add support for QS8/QS16 NEON Arithmetic Add/Sub/Mul.

Change-Id: Ia482498688ca1884272b5062e3415e736e03d36f
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/80448
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
diff --git a/arm_compute/core/NEON/kernels/NEPixelWiseMultiplicationKernel.h b/arm_compute/core/NEON/kernels/NEPixelWiseMultiplicationKernel.h
index 433a20e..bf96c90 100644
--- a/arm_compute/core/NEON/kernels/NEPixelWiseMultiplicationKernel.h
+++ b/arm_compute/core/NEON/kernels/NEPixelWiseMultiplicationKernel.h
@@ -51,10 +51,11 @@
      *
      * @note For @p scale equal to 1/255 only round to nearest even (implemented as round half up) is supported.
      *       For all other scale values only round to zero (implemented as round towards minus infinity) is supported.
+     *       For QS8/QS16 scale = 1 is the only supported value.
      *
-     * @param[in]  input1          An input tensor. Data types supported: U8/QS8/S16/F16/F32.
-     * @param[in]  input2          An input tensor. Data types supported: U8/QS8/S16/F16/F32.
-     * @param[out] output          The output tensor. Data types supported: U8 (Only if both inputs are U8) /S16/F16/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]  scale           Scale to apply after multiplication.
      *                             Scale must be positive and its value must be either 1/255 or 1/2^n where n is between 0 and 15.
      * @param[in]  overflow_policy Overflow policy.