SWDEV-301289 - Treewide macro rename

ATI_OS_WIN -> _WIN32
ATI_OS_LINUX -> __linux__

We should not rely on non-standard macros for platform detections.

Change-Id: If1d06e2e1187268df62a59609ea5496ab7eb709d

opencl/amdocl/cl_icd.cpp

@@ -134,7 +134,7 @@ cl_icd_dispatch amd::ICDDispatchedObject::icdVendorDispatch_[] = {
      clSetProgramReleaseCallback,
      clSetProgramSpecializationConstant }};
 
-#if defined(ATI_OS_WIN)
+#if defined(_WIN32)
 #include <Shlwapi.h>
 
 #pragma comment(lib, "shlwapi.lib")
@@ -260,7 +260,7 @@ static bool ShouldLoadPlatform() {
   return shouldLoad;
 }
 
-#endif // defined(ATI_OS_WIN)
+#endif // defined(_WIN32)
 
 CL_API_ENTRY cl_int CL_API_CALL clIcdGetPlatformIDsKHR(cl_uint num_entries,
                                                        cl_platform_id* platforms,