zorro: Drop useless (and hardly used) .driver member in struct zorro_dev

The only actual use is to check in zorro_device_probe() that the device
isn't already bound. The driver core already ensures this however so the
check can go away which allows to drop the then assigned-only member
from struct zorro_dev.

If the value was indeed needed somewhere it can always be calculated by

to_zorro_driver(z->dev.driver)

.

Signed-off-by: Uwe Kleine-König <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/zorro/zorro-driver.c

···
 	struct zorro_driver *drv = to_zorro_driver(dev->driver);
 	struct zorro_dev *z = to_zorro_dev(dev);
 
-	if (!z->driver && drv->probe) {
+	if (drv->probe) {
 		const struct zorro_device_id *id;
 
 		id = zorro_match_device(drv->id_table, z);
 		if (id)
 			error = drv->probe(z, id);
-		if (error >= 0) {
-			z->driver = drv;
+		if (error >= 0)
 			error = 0;
-		}
 	}
 	return error;
 }
···
 
 	if (drv->remove)
 		drv->remove(z);
-	z->driver = NULL;
 }
 
 

include/linux/zorro.h

···
 struct zorro_dev {
     struct ExpansionRom rom;
     zorro_id id;
-    struct zorro_driver *driver;	/* which driver has allocated this device */
     struct device dev;			/* Generic device interface */
     u16 slotaddr;
     u16 slotsize;