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>
---
 drivers/bcma/main.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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