ACPI: PM: s2idle: Eliminate acpi_sleep_no_ec_events()

Change acpi_ec_suspend() to use pm_suspend_no_platform() instead of
acpi_sleep_no_ec_events(), which allows the latter to be eliminated
along with the s2idle_in_progress variable which is only used by it.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 5a38409..be29b991 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -1941,7 +1941,7 @@ static int acpi_ec_suspend(struct device *dev)
 	struct acpi_ec *ec =
 		acpi_driver_data(to_acpi_device(dev));
 
-	if (acpi_sleep_no_ec_events() && ec_freeze_events)
+	if (!pm_suspend_no_platform() && ec_freeze_events)
 		acpi_ec_disable_event(ec);
 	return 0;
 }