PM: sleep: Make pm_wakeup_clear() call more clear

Move pm_wakeup_clear() to the same location as other functions that do
bookkeeping prior to suspend_prepare().

Since calling pm_wakeup_clear() is a prerequisite to setting up for
suspend and enabling functionalities of suspend (like aborting during
suspend), moving pm_wakeup_clear() higher up the call stack makes its
intent more clear and obvious that it is called prior to
suspend_prepare().

After this change, there is a slightly larger window when abort events
can be registered, but otherwise suspend functionality is the same.

Suggested-by: Saravana Kannan <saravanak@google.com>
Signed-off-by: Samuel Wu <wusamuel@google.com>
Link: https://patch.msgid.link/20250821004237.2712312-2-wusamuel@google.com
Reviewed-by: Saravana Kannan <saravanak@google.com>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Author: wusamuel6

kernel/power/process.c

@@ -132,7 +132,6 @@ int freeze_processes(void)
 	if (!pm_freezing)
 		static_branch_inc(&freezer_active);
 
-	pm_wakeup_clear(0);
 	pm_freezing = true;
 	error = try_to_freeze_tasks(true);
 	if (!error)

kernel/power/suspend.c

@@ -595,6 +595,7 @@ static int enter_state(suspend_state_t state)
 	}
 
 	pm_pr_dbg("Preparing system for sleep (%s)\n", mem_sleep_labels[state]);
+	pm_wakeup_clear(0);
 	pm_suspend_clear_flags();
 	error = suspend_prepare(state);
 	if (error)