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/boot/Kconfig b/boot/Kconfig
index 4a001bc..668270c 100644
--- a/boot/Kconfig
+++ b/boot/Kconfig
@@ -654,7 +654,7 @@
 	default TEXT_BASE
 	help
 	  The physical start address of boot monitor code (which is the same as
-	  CONFIG_TEXT_BASE when linking) and the same as CONFIG_SYS_FLASH_BASE
+	  CONFIG_TEXT_BASE when linking) and the same as CFG_SYS_FLASH_BASE
 	  when booting from flash.
 
 config SPL_SYS_MONITOR_BASE