PM / Runtime: Generic resume shouldn't set RPM_ACTIVE unconditionally

The __pm_generic_resume() function changes the given device's runtime
PM status to RPM_ACTIVE if its driver's callback returns 0, but it
only should do that if the rumtime PM is enabled for the device.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
diff --git a/drivers/base/power/generic_ops.c b/drivers/base/power/generic_ops.c
index 3d2c350..42f97f9 100644
--- a/drivers/base/power/generic_ops.c
+++ b/drivers/base/power/generic_ops.c
@@ -185,7 +185,7 @@
 		return 0;
 
 	ret = callback(dev);
-	if (!ret) {
+	if (!ret && pm_runtime_enabled(dev)) {
 		pm_runtime_disable(dev);
 		pm_runtime_set_active(dev);
 		pm_runtime_enable(dev);