COMPMID-1814 : NEScale add support for TOP_LEFT and QASYMM8

Added support for TOP_LEFT sampling policy and QASYMM8 data type.

Change-Id: Id9135bb4b6ebd93f1d6fb70b06e83684a167eb94
Reviewed-on: https://review.mlplatform.org/533
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michalis Spyrou <michalis.spyrou@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
diff --git a/arm_compute/core/NEON/kernels/NEScaleKernel.h b/arm_compute/core/NEON/kernels/NEScaleKernel.h
index c851b3d..83d9964 100644
--- a/arm_compute/core/NEON/kernels/NEScaleKernel.h
+++ b/arm_compute/core/NEON/kernels/NEScaleKernel.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2018 ARM Limited.
+ * Copyright (c) 2016-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -110,6 +110,7 @@
     InterpolationPolicy _policy;
     BorderSize          _border_size;
     BorderMode          _border_mode;
+    float               _sampling_offset;
 };
 } // namespace arm_compute
 #endif /*__ARM_COMPUTE_NESCALEKERNEL_H__ */