[SYCL] Enable the test reduction_nd_ext_half.cpp for opencl (#406)

The test was renewed/stabilized earlier. It also checks for aspect::fp16 before
running the test cases using FP16 data.

Signed-off-by: Vyacheslav N Klochkov <[email protected]>

Author: v-klochkov

SYCL/Reduction/reduction_nd_ext_half.cpp

@@ -1,12 +1,7 @@
-// Sporadic failure
-// UNSUPPORTED: opencl && windows
-
 // RUN: %clangxx -fsycl -fsycl-targets=%sycl_triple %s -o %t.out
 // RUN: %GPU_RUN_PLACEHOLDER %t.out
-
-// TODO: Enable the test for CPU/ACC when they support half type.
-// RUNx: %CPU_RUN_PLACEHOLDER %t.out
-// RUNx: %ACC_RUN_PLACEHOLDER %t.out
+// RUN: %CPU_RUN_PLACEHOLDER %t.out
+// RUN: %ACC_RUN_PLACEHOLDER %t.out
 
 // TODO: Enable the test for HOST when it supports intel::reduce() and barrier()
 // RUNx: %HOST_RUN_PLACEHOLDER %t.out