[SYCL] Enable early optimizations for spec_const LIT test (#2448)

Author: Fznamznon

sycl/test/spec_const/spec_const_hw.cpp

@@ -1,9 +1,6 @@
-// TODO: Enable compilation w/o -fno-sycl-early-optimizations option.
-// See https://github.com/intel/llvm/issues/2264 for more details.
-
 // UNSUPPORTED: cuda || level_zero
 //
-// RUN: %clangxx -fsycl -fno-sycl-early-optimizations -fsycl-targets=%sycl_triple %s -o %t.out
+// RUN: %clangxx -fsycl -fsycl-targets=%sycl_triple %s -o %t.out
 // RUN: env SYCL_DEVICE_TYPE=HOST %t.out
 // RUN: %CPU_RUN_PLACEHOLDER %t.out
 // RUN: %GPU_RUN_PLACEHOLDER %t.out