COMPMID-2336: Additional warnings for import_memory()

warning about the use of inplace operators have been added for OpenCL and CPU

Change-Id: Ica8f50c138d94dfca6c301f6580346ec4e241c9b
Signed-off-by: Manuel Bottini <manuel.bottini@arm.com>
Reviewed-on: https://review.mlplatform.org/c/1602
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/runtime/CL/CLTensorAllocator.h b/arm_compute/runtime/CL/CLTensorAllocator.h
index a60594c..982cc51 100644
--- a/arm_compute/runtime/CL/CLTensorAllocator.h
+++ b/arm_compute/runtime/CL/CLTensorAllocator.h
@@ -114,6 +114,7 @@
      * @warning memory is expected to be aligned with the device requirements.
      * @warning tensor shouldn't be memory managed.
      * @warning ownership of memory is not transferred.
+     * @warning memory must be writable in case of in-place operations
      * @warning padding should be accounted by the client code.
      * @note buffer size will be checked to be compliant with total_size reported by ITensorInfo.
      *