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/common/spl/spl_nor.c b/common/spl/spl_nor.c
index eaa95fb..1ef5e41 100644
--- a/common/spl/spl_nor.c
+++ b/common/spl/spl_nor.c
@@ -20,7 +20,7 @@
 
 unsigned long __weak spl_nor_get_uboot_base(void)
 {
-	return CONFIG_SYS_UBOOT_BASE;
+	return CFG_SYS_UBOOT_BASE;
 }
 
 static int spl_nor_load_image(struct spl_image_info *spl_image,