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>

drivers/net/phy/miiphybb.c

@@ -377,4 +377,4 @@ int bb_miiphy_write (char *devname, unsigned char addr,
 	bus->delay(bus);
 
 	return 0;
-}
\ No newline at end of file
+}