global: Move remaining CONFIG_SYS_NAND_* to CFG_SYS_NAND_*

The rest of the unmigrated CONFIG symbols in the CONFIG_SYS_NAND
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/colibri_imx7.h b/include/configs/colibri_imx7.h
index 5c7a9f2..f9bf849 100644
--- a/include/configs/colibri_imx7.h
+++ b/include/configs/colibri_imx7.h
@@ -166,7 +166,7 @@
 
 #ifdef CONFIG_TARGET_COLIBRI_IMX7_NAND
 /* NAND stuff */
-#define CONFIG_SYS_NAND_BASE		0x40000000
+#define CFG_SYS_NAND_BASE		0x40000000
 #endif
 
 /* USB Configs */