drivers/greybus: Use kobj_to_dev()

Use kobj_to_dev() instead of container_of()

Signed-off-by: Wang Qing <[e-mail]>
Acked-by: Viresh Kumar <[e-mail]>
Acked-by: Johan Hovold <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/greybus/interface.c

···
 static umode_t interface_unipro_is_visible(struct kobject *kobj,
 					   struct attribute *attr, int n)
 {
-	struct device *dev = container_of(kobj, struct device, kobj);
+	struct device *dev = kobj_to_dev(kobj);
 	struct gb_interface *intf = to_gb_interface(dev);
 
 	switch (intf->type) {
···
 static umode_t interface_greybus_is_visible(struct kobject *kobj,
 					    struct attribute *attr, int n)
 {
-	struct device *dev = container_of(kobj, struct device, kobj);
+	struct device *dev = kobj_to_dev(kobj);
 	struct gb_interface *intf = to_gb_interface(dev);
 
 	switch (intf->type) {
···
 static umode_t interface_power_is_visible(struct kobject *kobj,
 					  struct attribute *attr, int n)
 {
-	struct device *dev = container_of(kobj, struct device, kobj);
+	struct device *dev = kobj_to_dev(kobj);
 	struct gb_interface *intf = to_gb_interface(dev);
 
 	switch (intf->type) {