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/doc/README.serial_multi b/doc/README.serial_multi
index c9049fd..0446fe9 100644
--- a/doc/README.serial_multi
+++ b/doc/README.serial_multi
@@ -35,7 +35,7 @@
 	setenv sout serial_scc; setenv baudrate 38400
 
 After that press 'enter' at the SCC console. Note that baudrates <38400
-are not allowed on LWMON with watchdog enabled (see CONFIG_SYS_BAUDRATE_TABLE in
+are not allowed on LWMON with watchdog enabled (see CFG_SYS_BAUDRATE_TABLE in
 include/configs/lwmon.h).