rename CFG_ macros to CONFIG_SYS

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/drivers/rtc/isl1208.c b/drivers/rtc/isl1208.c
index 87f06cc..71f63d5 100644
--- a/drivers/rtc/isl1208.c
+++ b/drivers/rtc/isl1208.c
@@ -153,12 +153,12 @@
 
 static uchar rtc_read (uchar reg)
 {
-	return (i2c_reg_read (CFG_I2C_RTC_ADDR, reg));
+	return (i2c_reg_read (CONFIG_SYS_I2C_RTC_ADDR, reg));
 }
 
 static void rtc_write (uchar reg, uchar val)
 {
-	i2c_reg_write (CFG_I2C_RTC_ADDR, reg, val);
+	i2c_reg_write (CONFIG_SYS_I2C_RTC_ADDR, reg, val);
 }
 
 static unsigned bcd2bin (uchar n)