smc911x: make smc911x_initialize return correct value

Make smc911x_initialize return -1 on error and number of interfaces
detected otherwise.

Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>

drivers/net/smc911x.c

@@ -243,7 +243,7 @@ int smc911x_initialize(u8 dev_num, int base_addr)
 	dev = malloc(sizeof(*dev));
 	if (!dev) {
 		free(dev);
-		return 0;
+		return -1;
 	}
 	memset(dev, 0, sizeof(*dev));
 
@@ -271,5 +271,5 @@ int smc911x_initialize(u8 dev_num, int base_addr)
 	sprintf(dev->name, "%s-%hu", DRIVERNAME, dev_num);
 
 	eth_register(dev);
-	return 0;
+	return 1;
 }