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/env/Kconfig b/env/Kconfig
index 24111df..4e506ae 100644
--- a/env/Kconfig
+++ b/env/Kconfig
@@ -140,7 +140,7 @@
 	   type flash chips the second sector can be used: the offset
 	   for this sector is given here.
 
-	   CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE.
+	   CONFIG_ENV_OFFSET is used relative to CFG_SYS_FLASH_BASE.
 
 	  CONFIG_ENV_ADDR: