mtd: rename CONFIG_NAND -> CONFIG_MTD_RAW_NAND

Add more clarity by changing the Kconfig entry name.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
[trini: Re-run migration, update a few more cases]
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
diff --git a/board/BuR/brppt1/board.c b/board/BuR/brppt1/board.c
index dd9649c..8aa03ea 100644
--- a/board/BuR/brppt1/board.c
+++ b/board/BuR/brppt1/board.c
@@ -150,7 +150,7 @@
 	hw_watchdog_init();
 #endif
 	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
-#ifdef CONFIG_NAND
+#ifdef CONFIG_MTD_RAW_NAND
 	gpmc_init();
 #endif
 	return 0;