drivers/net/phy/miiphybb.c: fix warning: no newline at end of file

Add missing newline.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Luigi Mantellini <luigi.mantellini@idf-hit.com>
Cc: Ben Warren <biggerbadderben@gmail.com>
diff --git a/drivers/net/phy/miiphybb.c b/drivers/net/phy/miiphybb.c
index 44c45fa..4a7ce5b 100644
--- a/drivers/net/phy/miiphybb.c
+++ b/drivers/net/phy/miiphybb.c
@@ -377,4 +377,4 @@
 	bus->delay(bus);
 
 	return 0;
-}
\ No newline at end of file
+}