staging: iio: isl29028: use the runtime power management for system sleep

With the introduction of runtime power management in commit 2db5054a
("staging: iio: isl29028: add runtime power management support"), the
system could go to sleep and turn off the device without notifying the
runtime power management code. This patch changes the system suspend
and resume to go through the runtime power management.
Signed-off-by: NBrian Masney <masneyb@onstation.org>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

drivers/staging/iio/light/isl29028.c

@@ -656,7 +656,8 @@ static int __maybe_unused isl29028_resume(struct device *dev)
 }
 
 static const struct dev_pm_ops isl29028_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(isl29028_suspend, isl29028_resume)
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				pm_runtime_force_resume)
 	SET_RUNTIME_PM_OPS(isl29028_suspend, isl29028_resume, NULL)
 };