PM: tracing: Hide psci_domain_idle events under ARM_PSCI_CPUIDLE

The events psci_domain_idle_enter and psci_domain_idle_exit events are
only called when CONFIG_ARM_PSCI_CPUIDLE is defined. As each event can
take up to 5K (less for DEFINE_EVENT()) regardless if they are used or
not, it's best not to define them when they are not used. Add #ifdef
around these events when they are not used.

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/20250612145408.074769245@goodmis.org
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

Author: rostedt

include/trace/events/power.h

@@ -62,6 +62,7 @@ TRACE_EVENT(cpu_idle_miss,
 		(unsigned long)__entry->state, (__entry->below)?"below":"above")
 );
 
+#ifdef CONFIG_ARM_PSCI_CPUIDLE
 DECLARE_EVENT_CLASS(psci_domain_idle,
 
 	TP_PROTO(unsigned int cpu_id, unsigned int state, bool s2idle),
@@ -98,6 +99,7 @@ DEFINE_EVENT(psci_domain_idle, psci_domain_idle_exit,
 
 	TP_ARGS(cpu_id, state, s2idle)
 );
+#endif
 
 TRACE_EVENT(pstate_sample,