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/configs/am335x_igep003x_defconfig b/configs/am335x_igep003x_defconfig
index cf21b14..6d812d8 100644
--- a/configs/am335x_igep003x_defconfig
+++ b/configs/am335x_igep003x_defconfig
@@ -64,7 +64,7 @@
 CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
 CONFIG_DM_MMC=y
 CONFIG_MMC_OMAP_HS=y
-CONFIG_NAND=y
+CONFIG_MTD_RAW_NAND=y
 CONFIG_MTD_UBI_FASTMAP=y
 CONFIG_MII=y
 CONFIG_DRIVER_TI_CPSW=y