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/snapper9g45.h b/include/configs/snapper9g45.h
index 29462c5..7c35c91 100644
--- a/include/configs/snapper9g45.h
+++ b/include/configs/snapper9g45.h
@@ -29,11 +29,11 @@
 /* Mem test settings */
 
 /* NAND Flash */
-#define CONFIG_SYS_NAND_BASE		ATMEL_BASE_CS3
-#define CONFIG_SYS_NAND_MASK_ALE	(1 << 21) /* AD21 */
-#define CONFIG_SYS_NAND_MASK_CLE	(1 << 22) /* AD22 */
-#define CONFIG_SYS_NAND_ENABLE_PIN	AT91_PIN_PC14
-#define CONFIG_SYS_NAND_READY_PIN	AT91_PIN_PC8
+#define CFG_SYS_NAND_BASE		ATMEL_BASE_CS3
+#define CFG_SYS_NAND_MASK_ALE	(1 << 21) /* AD21 */
+#define CFG_SYS_NAND_MASK_CLE	(1 << 22) /* AD22 */
+#define CFG_SYS_NAND_ENABLE_PIN	AT91_PIN_PC14
+#define CFG_SYS_NAND_READY_PIN	AT91_PIN_PC8
 
 /* UARTs/Serial console */