COMPMID-1534 - Fix GEMM and Magnitude test for FP16

On GEMM we had accuracy issue
On Magnitude we have disabled the fp16 acceleration since we do not have feature parity with CL
and this function is not used for ML

Change-Id: Iaebe3bbbd2a9f45db0c714aa5ebaf48eb0b65741
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/145467
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
diff --git a/arm_compute/runtime/CL/functions/CLMagnitude.h b/arm_compute/runtime/CL/functions/CLMagnitude.h
index f9c7e5c1..9fd85f9 100644
--- a/arm_compute/runtime/CL/functions/CLMagnitude.h
+++ b/arm_compute/runtime/CL/functions/CLMagnitude.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2017 ARM Limited.
+ * Copyright (c) 2016-2018 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -41,9 +41,8 @@
      * @param[in]  input2   Second tensor input. Data types supported: S16.
      * @param[out] output   Output tensor. Data types supported: S16.
      * @param[in]  mag_type (Optional) Magnitude calculation type. Default: L2NORM.
-     * @param[in]  use_fp16 (Optional) If true the FP16 kernels will be used. If false F32 kernels are used.
      */
-    void configure(const ICLTensor *input1, const ICLTensor *input2, ICLTensor *output, MagnitudeType mag_type = MagnitudeType::L2NORM, bool use_fp16 = false);
+    void configure(const ICLTensor *input1, const ICLTensor *input2, ICLTensor *output, MagnitudeType mag_type = MagnitudeType::L2NORM);
 };
 }
 #endif /*__ARM_COMPUTE_CLMAGNITUDE_H__ */