rename CFG_ macros to CONFIG_SYS

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/common/cmd_dtt.c b/common/cmd_dtt.c
index 956dc69..c5b1d4d 100644
--- a/common/cmd_dtt.c
+++ b/common/cmd_dtt.c
@@ -36,7 +36,7 @@
 
 	/* switch to correct I2C bus */
 	old_bus = I2C_GET_BUS();
-	I2C_SET_BUS(CFG_DTT_BUS_NUM);
+	I2C_SET_BUS(CONFIG_SYS_DTT_BUS_NUM);
 
 	/*
 	 * Loop through sensors, read