intel: move stubs to the respective source files
diff --git a/icd/intel/gpu.h b/icd/intel/gpu.h
index 96adfb2..fac16bc 100644
--- a/icd/intel/gpu.h
+++ b/icd/intel/gpu.h
@@ -107,4 +107,9 @@
     XGL_PHYSICAL_GPU                            gpu,
     const XGL_CHAR*                             pExtName);
 
+XGL_RESULT XGLAPI intelGetMultiGpuCompatibility(
+    XGL_PHYSICAL_GPU                            gpu0,
+    XGL_PHYSICAL_GPU                            gpu1,
+    XGL_GPU_COMPATIBILITY_INFO*                 pInfo);
+
 #endif /* GPU_H */