rename CFG_ macros to CONFIG_SYS

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/cpu/leon3/serial.c b/cpu/leon3/serial.c
index 27d5cd3..4b2fcb8 100644
--- a/cpu/leon3/serial.c
+++ b/cpu/leon3/serial.c
@@ -58,7 +58,7 @@
 		 *
 		 * Receiver & transmitter enable
 		 */
-		leon3_apbuart->scaler = CFG_GRLIB_APBUART_SCALER;
+		leon3_apbuart->scaler = CONFIG_SYS_GRLIB_APBUART_SCALER;
 
 		/* Let bit 11 be unchanged (debug bit for GRMON) */
 		tmp = READ_WORD(leon3_apbuart->ctrl);