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/apf27_defconfig b/configs/apf27_defconfig
index 21ada47..1befb7e 100644
--- a/configs/apf27_defconfig
+++ b/configs/apf27_defconfig
@@ -48,7 +48,7 @@
 CONFIG_FPGA_SPARTAN3=y
 CONFIG_MXC_GPIO=y
 CONFIG_MMC_MXC=y
-CONFIG_NAND=y
+CONFIG_MTD_RAW_NAND=y
 CONFIG_NAND_MXC=y
 CONFIG_SYS_NAND_BUSWIDTH_16BIT=y
 CONFIG_MII=y