tracing: Use guard() rather than scoped_guard()

Using scoped_guard() in the implementation of trace_##name() adds an
unnecessary level of indentation.

Cc: Steven Rostedt <[e-mail]>
Cc: Linus Torvalds <[e-mail]>
Cc: Thomas Gleixner <[e-mail]>
Cc: Michael Jeanson <[e-mail]>
Cc: Masami Hiramatsu <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Alexei Starovoitov <[e-mail]>
Cc: Yonghong Song <[e-mail]>
Cc: Paul E. McKenney <[e-mail]>
Cc: Ingo Molnar <[e-mail]>
Cc: Arnaldo Carvalho de Melo <[e-mail]>
Cc: Mark Rutland <[e-mail]>
Cc: Alexander Shishkin <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Cc: Andrii Nakryiko <[e-mail]>
Cc: [e-mail]
Cc: Joel Fernandes <[e-mail]>
Cc: Jordan Rife <[e-mail]>
Link: https://lore.kernel.org/[e-mail]
Signed-off-by: Mathieu Desnoyers <[e-mail]>
Signed-off-by: Steven Rostedt (Google) <[e-mail]>

include/linux/tracepoint.h

···
 	{								\
 		if (static_branch_unlikely(&__tracepoint_##name.key)) { \
 			if (cond) {					\
-				scoped_guard(preempt_notrace)		\
-					__DO_TRACE_CALL(name, TP_ARGS(args)); \
+				guard(preempt_notrace)();		\
+				__DO_TRACE_CALL(name, TP_ARGS(args));	\
 			}						\
 		}							\
 		if (IS_ENABLED(CONFIG_LOCKDEP) && (cond)) {		\
···
 	{								\
 		might_fault();						\
 		if (static_branch_unlikely(&__tracepoint_##name.key)) {	\
-			scoped_guard(rcu_tasks_trace)			\
-				__DO_TRACE_CALL(name, TP_ARGS(args));	\
+			guard(rcu_tasks_trace)();			\
+			__DO_TRACE_CALL(name, TP_ARGS(args));		\
 		}							\
 		if (IS_ENABLED(CONFIG_LOCKDEP)) {			\
 			WARN_ONCE(!rcu_is_watching(),			\