COMPMID-556: Add support to build arm64-v8.2-a for Android platform (clang compiler)

Change-Id: Ibb779dd3a8d10786da6d8f70590e654e14654d7b
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/95530
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Pablo Tello <pablo.tello@arm.com>
diff --git a/arm_compute/core/NEON/kernels/NECannyEdgeKernel.h b/arm_compute/core/NEON/kernels/NECannyEdgeKernel.h
index 4f1a1f3..a57c389 100644
--- a/arm_compute/core/NEON/kernels/NECannyEdgeKernel.h
+++ b/arm_compute/core/NEON/kernels/NECannyEdgeKernel.h
@@ -81,7 +81,7 @@
     ITensor          *_phase;     /**< Destination tensor - Quantized phase */
 };
 
-#ifdef ARM_COMPUTE_AARCH64_V8_2
+#ifdef __ARM_FEATURE_FP16_VECTOR_ARITHMETIC
 /** NEON kernel to perform Gradient computation
  */
 class NEGradientFP16Kernel : public NEGradientKernel
@@ -90,9 +90,9 @@
     // Inherited methods overriden:
     void configure(const ITensor *gx, const ITensor *gy, ITensor *magnitude, ITensor *phase, int32_t norm_type) override;
 };
-#else  /* ARM_COMPUTE_AARCH64_V8_2 */
+#else  /* __ARM_FEATURE_FP16_VECTOR_ARITHMETIC */
 using NEGradientFP16Kernel = NEGradientKernel;
-#endif /* ARM_COMPUTE_AARCH64_V8_2 */
+#endif /* __ARM_FEATURE_FP16_VECTOR_ARITHMETIC */
 
 /** NEON kernel to perform Non-Maxima suppression for Canny Edge.
  *