bcma: return correct error code when bus scan failed

It is better to return the actual error code than just -1.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/bcma/main.c

@@ -237,7 +237,7 @@ int bcma_bus_register(struct bcma_bus *bus)
 	err = bcma_bus_scan(bus);
 	if (err) {
 		bcma_err(bus, "Failed to scan: %d\n", err);
-		return -1;
+		return err;
 	}
 
 	/* Early init CC core */