pm: Just check the forced flag

When suspending we don't need to set the forced flag but just check if
it is set.

Signed-off-by: Flavio Ceolin <[email protected]>

Author: Flavio Ceolin

subsys/pm/pm.c

@@ -203,7 +203,7 @@ bool pm_system_suspend(int32_t ticks)
 
 	SYS_PORT_TRACING_FUNC_ENTER(pm, system_suspend, ticks);
 
-	if (!atomic_test_and_set_bit(z_cpus_pm_state_forced, id)) {
+	if (!atomic_test_bit(z_cpus_pm_state_forced, id)) {
 		const struct pm_state_info *info;
 
 		info = pm_policy_next_state(id, ticks);