COMPMID-1023: Import memory for OpenCL

Change-Id: I201bc00a1261814737e6b6878ecfe9904bae0cc1
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/128212
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
diff --git a/arm_compute/runtime/CL/CLTensor.h b/arm_compute/runtime/CL/CLTensor.h
index e05f307..c47d2be 100644
--- a/arm_compute/runtime/CL/CLTensor.h
+++ b/arm_compute/runtime/CL/CLTensor.h
@@ -45,7 +45,7 @@
      *
      * @return A pointer to the tensor's allocator
      */
-    ITensorAllocator *allocator();
+    CLTensorAllocator *allocator();
     /** Enqueue a map operation of the allocated buffer.
      *
      * @param[in] blocking If true, then the mapping will be ready to use by the time