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/rut_defconfig b/configs/rut_defconfig
index 651614e..6a75e1c 100644
--- a/configs/rut_defconfig
+++ b/configs/rut_defconfig
@@ -68,7 +68,7 @@
 CONFIG_BOOTCOUNT_BOOTLIMIT=3
 CONFIG_DFU_NAND=y
 CONFIG_MMC_OMAP_HS=y
-CONFIG_NAND=y
+CONFIG_MTD_RAW_NAND=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_WINBOND=y
 CONFIG_MTD_UBI_FASTMAP=y