drivers/greybus: Use kobj_to_dev()

Use kobj_to_dev() instead of container_of()
Signed-off-by: Wang Qing <wangqing@vivo.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/1597289690-22857-1-git-send-email-wangqing@vivo.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/greybus/interface.c

@@ -620,7 +620,7 @@ static struct attribute *interface_common_attrs[] = {
 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) {
@@ -635,7 +635,7 @@ static umode_t interface_unipro_is_visible(struct kobject *kobj,
 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) {
@@ -649,7 +649,7 @@ static umode_t interface_greybus_is_visible(struct kobject *kobj,
 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) {