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/at91sam9x5ek.h b/include/configs/at91sam9x5ek.h
index b8a14d5..40ea4ed 100644
--- a/include/configs/at91sam9x5ek.h
+++ b/include/configs/at91sam9x5ek.h
@@ -27,13 +27,13 @@
 
 /* NAND flash */
 #ifdef CONFIG_CMD_NAND
-#define CONFIG_SYS_NAND_BASE		0x40000000
+#define CFG_SYS_NAND_BASE		0x40000000
 /* our ALE is AD21 */
-#define CONFIG_SYS_NAND_MASK_ALE	(1 << 21)
+#define CFG_SYS_NAND_MASK_ALE	(1 << 21)
 /* our CLE is AD22 */
-#define CONFIG_SYS_NAND_MASK_CLE	(1 << 22)
-#define CONFIG_SYS_NAND_ENABLE_PIN	AT91_PIN_PD4
-#define CONFIG_SYS_NAND_READY_PIN	AT91_PIN_PD5
+#define CFG_SYS_NAND_MASK_CLE	(1 << 22)
+#define CFG_SYS_NAND_ENABLE_PIN	AT91_PIN_PD4
+#define CFG_SYS_NAND_READY_PIN	AT91_PIN_PD5
 #endif
 
 /* SPL */