greybus: don't set ->dev.driver to NULL when it is already NULL

Parent objects of 'dev' are allocated with kzalloc() and so all of their fields
are initialized with 0. Hence no need of marking them NULL again.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

drivers/staging/greybus/connection.c

@@ -185,7 +185,6 @@ struct gb_connection *gb_connection_create(struct gb_interface *interface,
 	connection->state = GB_CONNECTION_STATE_DISABLED;
 
 	connection->dev.parent = &interface->dev;
-	connection->dev.driver = NULL;
 	connection->dev.bus = &greybus_bus_type;
 	connection->dev.type = &greybus_connection_type;
 	connection->dev.groups = connection_groups;

drivers/staging/greybus/interface.c

@@ -69,7 +69,6 @@ gb_interface_create(struct gb_module *gmod, u8 interface_id)
 	/* Build up the interface device structures and register it with the
 	 * driver core */
 	interface->dev.parent = &gmod->dev;
-	interface->dev.driver = NULL;
 	interface->dev.bus = &greybus_bus_type;
 	interface->dev.type = &greybus_interface_type;
 	interface->dev.groups = interface_groups;

drivers/staging/greybus/module.c

@@ -90,7 +90,6 @@ struct gb_module *gb_module_create(struct greybus_host_device *hd, u8 module_id)
 	spin_unlock_irq(&gb_modules_lock);
 
 	gmod->dev.parent = hd->parent;
-	gmod->dev.driver = NULL;
 	gmod->dev.bus = &greybus_bus_type;
 	gmod->dev.type = &greybus_module_type;
 	gmod->dev.groups = greybus_module_groups;