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/tests/ocltst/env/oclsysinfo.cpp

@@ -147,7 +147,7 @@ int oclSysInfo(std::string &info_string, bool use_cpu, unsigned dev_id,
   clGetDeviceInfo(device, CL_DEVICE_BOARD_NAME_AMD, sizeof(c), &c, NULL);
   sprintf(tmpString, "\tBoard Name: %s\n", c);
   info_string.append(tmpString);
-#if defined(ATI_OS_LINUX)
+#if defined(__linux__)
   cl_device_topology_amd topology;
   clGetDeviceInfo(device, CL_DEVICE_TOPOLOGY_AMD, sizeof(topology), &topology,
                   NULL);