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/sama5d3xek.h b/include/configs/sama5d3xek.h
index 3f58928..4f579ad 100644
--- a/include/configs/sama5d3xek.h
+++ b/include/configs/sama5d3xek.h
@@ -27,7 +27,7 @@
 
 /* NOR flash */
 #ifdef CONFIG_MTD_NOR_FLASH
-#define CONFIG_SYS_FLASH_BASE		0x10000000
+#define CFG_SYS_FLASH_BASE		0x10000000
 #endif
 
 /* SDRAM */