Update operator list documentation

All the common information for the operators are stored in OperatorList.h.

All data type and data layout information for the operators are store in the function header files.

Partially resolve: COMPMID-4199

Signed-off-by: Sheri Zhang <sheri.zhang@arm.com>
Change-Id: I272948cfb3f84e42232a82dd84c0158d84642099
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/5511
Reviewed-by: SiCong Li <sicong.li@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/runtime/NEON/functions/NEArithmeticAddition.h b/arm_compute/runtime/NEON/functions/NEArithmeticAddition.h
index 8f9fd27..734e350 100644
--- a/arm_compute/runtime/NEON/functions/NEArithmeticAddition.h
+++ b/arm_compute/runtime/NEON/functions/NEArithmeticAddition.h
@@ -51,19 +51,25 @@
     NEArithmeticAddition &operator=(NEArithmeticAddition &&);
     /** Initialise the kernel's inputs, output and conversion policy.
      *
-     * Valid configurations (Input1,Input2) -> Output :
+     * Valid data layouts:
+     * - NHWC
+     * - NCHW
      *
-     *   - (U8,U8)           -> U8
-     *   - (U8,U8)           -> S16
-     *   - (S16,U8)          -> S16
-     *   - (U8,S16)          -> S16
-     *   - (S16,S16)         -> S16
-     *   - (S32,S32)         -> S32
-     *   - (F16,F16)         -> F16
-     *   - (F32,F32)         -> F32
-     *   - (QASYMM8,QASYMM8) -> QASYMM8
-     *   - (QASYMM8_SIGNED,QASYMM8_SIGNED) -> QASYMM8_SIGNED
-     *   - (QSYMM16,QSYMM16) -> QSYMM16
+     * Valid data type configurations:
+     * |src0           |src1           |dst            |
+     * |:--------------|:--------------|:--------------|
+     * |QASYMM8        |QASYMM8        |QASYMM8        |
+     * |QASYMM8_SIGNED |QASYMM8_SIGNED |QASYMM8_SIGNED |
+     * |QSYMM16        |QSYMM16        |QASYMM16       |
+     * |QSYMM16        |QSYMM16        |S32            |
+     * |U8             |U8             |U8             |
+     * |U8             |U8             |S16            |
+     * |U8             |S16            |S16            |
+     * |S16            |U8             |S16            |
+     * |S16            |S16            |S16            |
+     * |S32            |S32            |S32            |
+     * |F16            |F16            |F16            |
+     * |F32            |F32            |F32            |
      *
      * @param[in]  input1   First tensor input. Data types supported: U8/QASYMM8/QASYMM8_SIGNED/S16/QSYMM16/F16/S32/F32
      * @param[in]  input2   Second tensor input. Data types supported: U8/QASYMM8/QASYMM8_SIGNED/S16/QSYMM16/F16/S32/F32