mcb: use short version for function pointer for mcb_free_bus

Just a style change so that the device release callbacks are defined
in the same way for devices in mcb_bus and mcb_device.
Signed-off-by: Jorge Sanjuan Garcia <jorge.sanjuangarcia@duagon.com>
Co-developed-by: Jose Javier Rodriguez Barbarin <JoseJavier.Rodriguez@duagon.com>
Signed-off-by: Jose Javier Rodriguez Barbarin <JoseJavier.Rodriguez@duagon.com>
Link: https://lore.kernel.org/r/20230906114901.63174-3-JoseJavier.Rodriguez@duagon.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/mcb/mcb-core.c

@@ -288,7 +288,7 @@ struct mcb_bus *mcb_alloc_bus(struct device *carrier)
 	bus->dev.parent = carrier;
 	bus->dev.bus = &mcb_bus_type;
 	bus->dev.type = &mcb_carrier_device_type;
-	bus->dev.release = &mcb_free_bus;
+	bus->dev.release = mcb_free_bus;
 
 	dev_set_name(&bus->dev, "mcb:%d", bus_nr);
 	rc = device_add(&bus->dev);