COMPMID-3957: Deprecate neon CV functions.

Change-Id: Idfc215c4f95472e2e61d2972cfd5d33786cc088e
Signed-off-by: morgolock <pablo.tello@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4341
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Reviewed-by: Sheri Zhang <sheri.zhang@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/runtime/NEON/functions/NEHOGMultiDetection.h b/arm_compute/runtime/NEON/functions/NEHOGMultiDetection.h
index f273e55..f370dd2 100644
--- a/arm_compute/runtime/NEON/functions/NEHOGMultiDetection.h
+++ b/arm_compute/runtime/NEON/functions/NEHOGMultiDetection.h
@@ -54,6 +54,8 @@
          -# Normalization type
          -# L2 hysteresis threshold if the normalization type is L2HYS_NORM
  *
+ * @deprecated This function is deprecated and is intended to be removed in 21.05 release
+ *
  */
 class NEHOGMultiDetection : public IFunction
 {