Amiga zorro bus: Add missing zorro_device_remove()

Amiga zorro bus: Add missing zorro_device_remove(). Without this ifconfig and
/proc/net/dev oops after unloading a Zorro network device driver module.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/zorro/zorro-driver.c

diff --git a/drivers/zorro/zorro-driver.c b/drivers/zorro/zorro-driver.c
index 067c07be..e6c4390 100644
--- a/drivers/zorro/zorro-driver.c
+++ b/drivers/zorro/zorro-driver.c
@@ -60,6 +60,20 @@
 }
 
 
+static int zorro_device_remove(struct device *dev)
+{
+	struct zorro_dev *z = to_zorro_dev(dev);
+	struct zorro_driver *drv = to_zorro_driver(dev->driver);
+
+	if (drv) {
+		if (drv->remove)
+			drv->remove(z);
+		z->driver = NULL;
+	}
+	return 0;
+}
+
+
     /**
      *  zorro_register_driver - register a new Zorro driver
      *  @drv: the driver structure to register
@@ -128,6 +142,7 @@
 	.name	= "zorro",
 	.match	= zorro_bus_match,
 	.probe	= zorro_device_probe,
+	.remove	= zorro_device_remove,
 };