[SYCL][Libdevice] Build for spirv64 on Windows (intel#13649)

The root cause for disabling it on Windows was fixed in
intel@d074475.

Signed-off-by: Sarnie, Nick <nick.sarnie@intel.com>

libdevice/cmake/modules/SYCLLibdevice.cmake

@@ -22,16 +22,8 @@ string(CONCAT sycl_targets_opt
  "spir64_x86_64-unknown-unknown,"
  "spir64_gen-unknown-unknown,"
  "spir64_fpga-unknown-unknown,"
- "spir64-unknown-unknown")
-
-if (NOT WIN32)
- # Don't build for spirv64 on Windows due to
- # some type size difference issues.
- # Build on Windows once internal tracker is fixed.
- string(APPEND
- sycl_targets_opt
- ",spirv64-unknown-unknown")
-endif()
+ "spir64-unknown-unknown,"
+ "spirv64-unknown-unknown")
 
 set(compile_opts
  # suppress an error about SYCL_EXTERNAL being used for