mesa: switch to c11 mutex functions

Reviewed-by: José Fonseca <jfonseca@vmware.com>
diff --git a/doxygen/main.doxy b/doxygen/main.doxy
index 8b997b1..c258031 100644
--- a/doxygen/main.doxy
+++ b/doxygen/main.doxy
@@ -34,7 +34,7 @@
 INCLUDE_PATH           = ../include/
 INCLUDE_FILE_PATTERNS  = 
 PREDEFINED             = 
-EXPAND_AS_DEFINED      = _glthread_DECLARE_STATIC_MUTEX
+EXPAND_AS_DEFINED      = 
 SKIP_FUNCTION_MACROS   = YES
 #---------------------------------------------------------------------------
 # Configuration::addtions related to external references