ftrace: Rename ftrace_ops field from trampolines to nr_trampolines

Having two fields within the same struct that is off by one character
can be confusing and error prone. Rename the counter "trampolines"
to "nr_trampolines" to explicitly show it is a counter and not to
be confused by the "trampoline" field.

Suggested-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 7a5b7b9..6bb5e3f 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -120,7 +120,7 @@
 	void				*private;
 	int __percpu			*disabled;
 #ifdef CONFIG_DYNAMIC_FTRACE
-	int				trampolines;
+	int				nr_trampolines;
 	struct ftrace_hash		*notrace_hash;
 	struct ftrace_hash		*filter_hash;
 	struct ftrace_hash		*tramp_hash;