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/include/configs/lx2162aqds.h b/include/configs/lx2162aqds.h
index b70abb0..157688e 100644
--- a/include/configs/lx2162aqds.h
+++ b/include/configs/lx2162aqds.h
@@ -11,7 +11,7 @@
 /* USB */
 
 /* RTC */
-#define CONFIG_SYS_RTC_BUS_NUM		0
+#define CFG_SYS_RTC_BUS_NUM		0
 
 /* Initial environment variables */
 #define CONFIG_EXTRA_ENV_SETTINGS		\