Enabled support for QASYMM8 in ClCastKernel

* Partially resolves MLCE-736

Change-Id: I07140a21d9cc1f804cdf647ce863bb5e2eb10229
Signed-off-by: Pablo Marquez Tello <pablo.tello@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/6918
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Giorgio Arena <giorgio.arena@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/src/gpu/cl/kernels/ClCastKernel.cpp b/src/gpu/cl/kernels/ClCastKernel.cpp
index 48caf21..bfcd152 100644
--- a/src/gpu/cl/kernels/ClCastKernel.cpp
+++ b/src/gpu/cl/kernels/ClCastKernel.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2021 Arm Limited.
+ * Copyright (c) 2016-2022 Arm Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -52,7 +52,7 @@
     ARM_COMPUTE_RETURN_ERROR_ON(src == dst);
     ARM_COMPUTE_RETURN_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(src,
                                                          1,
-                                                         DataType::U8, DataType::S8, DataType::QSYMM8_PER_CHANNEL, DataType::S16,
+                                                         DataType::U8, DataType::S8, DataType::QASYMM8, DataType::QSYMM8_PER_CHANNEL, DataType::S16,
                                                          DataType::U16, DataType::U32, DataType::S32, DataType::F16,
                                                          DataType::F32);
     ARM_COMPUTE_RETURN_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(dst,