Make CpuFloorKernel kernel stateless

- Rename NEFloorKernel to CpuFloorKernel to accomodate new ISA
implementations
- Remove state and instead pass tensors to operate during run
- Add member function to generate an execution window given an input and
output tensor description

Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Change-Id: I9240b8ec534589c0f15c354f771f1ac5d7010c3b
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4773
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michalis Spyrou <michalis.spyrou@arm.com>
diff --git a/src/core/NEON/NEKernels.h b/src/core/NEON/NEKernels.h
index d6cd696..1e0b1f0 100644
--- a/src/core/NEON/NEKernels.h
+++ b/src/core/NEON/NEKernels.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2020 Arm Limited.
+ * Copyright (c) 2016-2021 Arm Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -69,7 +69,6 @@
 #include "src/core/NEON/kernels/NEFastCornersKernel.h"
 #include "src/core/NEON/kernels/NEFillArrayKernel.h"
 #include "src/core/NEON/kernels/NEFillBorderKernel.h"
-#include "src/core/NEON/kernels/NEFloorKernel.h"
 #include "src/core/NEON/kernels/NEFuseBatchNormalizationKernel.h"
 #include "src/core/NEON/kernels/NEGEMMInterleave4x4Kernel.h"
 #include "src/core/NEON/kernels/NEGEMMLowpMatrixMultiplyKernel.h"