tracepoints: synchronize unregister static inline

Turn tracepoint synchronize unregister into a static inline. There is no
reason to keep it as a macro over a static inline.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

include/linux/tracepoint.h

@@ -129,6 +129,9 @@ extern int tracepoint_get_iter_range(struct tracepoint **tracepoint,
  * probe unregistration and the end of module exit to make sure there is no
  * caller executing a probe when it is freed.
  */
-#define tracepoint_synchronize_unregister() synchronize_sched()
+static inline void tracepoint_synchronize_unregister(void)
+{
+	synchronize_sched();
+}
 
 #endif