global: Move remaining CONFIG_SYS_* to CFG_SYS_*

The rest of the unmigrated CONFIG symbols in the CONFIG_SYS namespace do
not easily transition to Kconfig. In many cases they likely should come
from the device tree instead. Move these out of CONFIG namespace and in
to CFG namespace.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/rtc/ds1307.c b/drivers/rtc/ds1307.c
index 40ca66b..0e9d3d2 100644
--- a/drivers/rtc/ds1307.c
+++ b/drivers/rtc/ds1307.c
@@ -80,8 +80,8 @@
 #endif
 /*---------------------------------------------------------------------*/
 
-#ifndef CONFIG_SYS_I2C_RTC_ADDR
-# define CONFIG_SYS_I2C_RTC_ADDR	0x68
+#ifndef CFG_SYS_I2C_RTC_ADDR
+# define CFG_SYS_I2C_RTC_ADDR	0x68
 #endif
 
 #if defined(CONFIG_RTC_DS1307) && (CONFIG_SYS_I2C_SPEED > 100000)
@@ -212,13 +212,13 @@
 static
 uchar rtc_read (uchar reg)
 {
-	return (i2c_reg_read (CONFIG_SYS_I2C_RTC_ADDR, reg));
+	return (i2c_reg_read (CFG_SYS_I2C_RTC_ADDR, reg));
 }
 
 
 static void rtc_write (uchar reg, uchar val)
 {
-	i2c_reg_write (CONFIG_SYS_I2C_RTC_ADDR, reg, val);
+	i2c_reg_write (CFG_SYS_I2C_RTC_ADDR, reg, val);
 }
 
 #endif /* !CONFIG_DM_RTC */