tracing: Fix #if CONFIG_MODULES to #ifdef CONFIG_MODULES

A typo was introduced when adding the ":mod:" command that did
a "#if CONFIG_MODULES" instead of a "#ifdef CONFIG_MODULES".
Fix it.

Cc: Masami Hiramatsu <[email protected]>
Cc: Mathieu Desnoyers <[email protected]>
Cc: Linus Torvalds <[email protected]>
Link: https://lore.kernel.org/[email protected]
Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Fixes: b355247 ("tracing: Cache ":mod:" events for modules not loaded yet")
Signed-off-by: Steven Rostedt (Google) <[email protected]>

Author: rostedt

kernel/trace/trace_events.c

@@ -857,7 +857,7 @@ static int ftrace_event_enable_disable(struct trace_event_file *file,
 	return __ftrace_event_enable_disable(file, enable, 0);
 }
 
-#if CONFIG_MODULES
+#ifdef CONFIG_MODULES
 struct event_mod_load {
 	struct list_head	list;
 	char			*module;