COMPMID-2774: Add support for QASYMM8_SIGNED in NEReductionOperation, NEReduceMean and NEArgMinMaxLayer

Signed-off-by: Luca Foschiani <luca.foschiani@arm.com>
Change-Id: Icf198a983c8ce2c6cd8451a1190bb99115eac3af
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/2652
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Reviewed-by: Giorgio Arena <giorgio.arena@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/runtime/NEON/functions/NEReductionOperation.h b/arm_compute/runtime/NEON/functions/NEReductionOperation.h
index 2414231..abda415 100644
--- a/arm_compute/runtime/NEON/functions/NEReductionOperation.h
+++ b/arm_compute/runtime/NEON/functions/NEReductionOperation.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019 ARM Limited.
+ * Copyright (c) 2017-2020 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -49,7 +49,7 @@
     NEReductionOperation(std::shared_ptr<IMemoryManager> memory_manager = nullptr);
     /** Set the input and output tensors.
      *
-     * @param[in]  input     Source tensor. Data type supported: QASYMM8/F16/F32. Data layouts supported: NCHW. (Written to only for border_size != 0)
+     * @param[in]  input     Source tensor. Data type supported: QASYMM8_SIGNED/QASYMM8/F16/F32. Data layouts supported: NCHW. (Written to only for border_size != 0)
      * @param[out] output    Destination tensor. Data types and data layouts supported: same as @p input.
      * @param[in]  axis      Dimension along which to reduce. Supported reduction axis : 0
      * @param[in]  op        Reduction operation to perform.
@@ -59,7 +59,7 @@
 
     /** Static function to check if given info will lead to a valid configuration of @ref NEReductionOperation.
      *
-     * @param[in] input     Source tensor info. Data type supported: QASYMM8/F16/F32. Data layouts supported: NCHW. (Written to only for border_size != 0)
+     * @param[in] input     Source tensor info. Data type supported: QASYMM8_SIGNED/QASYMM8/F16/F32. Data layouts supported: NCHW. (Written to only for border_size != 0)
      * @param[in] output    Destination tensor info. Data types and data layouts supported: same as @p input.
      * @param[in] axis      Dimension along which to reduce. Supported reduction axis : 0
      * @param[in] op        Reduction operation to perform.