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/board/egnite/ethernut5/ethernut5.c b/board/egnite/ethernut5/ethernut5.c
index 559fdd2..a5d79d8 100644
--- a/board/egnite/ethernut5/ethernut5.c
+++ b/board/egnite/ethernut5/ethernut5.c
@@ -117,11 +117,11 @@
 		AT91_SMC_MODE_TDF_CYCLE(2),
 		&smc->cs[3].mode);
 
-#ifdef CONFIG_SYS_NAND_READY_PIN
+#ifdef CFG_SYS_NAND_READY_PIN
 	/* Ready pin is optional. */
-	at91_set_pio_input(CONFIG_SYS_NAND_READY_PIN, 1);
+	at91_set_pio_input(CFG_SYS_NAND_READY_PIN, 1);
 #endif
-	gpio_direction_output(CONFIG_SYS_NAND_ENABLE_PIN, 1);
+	gpio_direction_output(CFG_SYS_NAND_ENABLE_PIN, 1);
 }
 #endif