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/imx6q_logic_defconfig b/configs/imx6q_logic_defconfig
index a1e1e39..cd20ecc 100644
--- a/configs/imx6q_logic_defconfig
+++ b/configs/imx6q_logic_defconfig
@@ -72,7 +72,7 @@
 CONFIG_LED_GPIO=y
 CONFIG_FSL_USDHC=y
 CONFIG_MTD=y
-CONFIG_NAND=y
+CONFIG_MTD_RAW_NAND=y
 CONFIG_SYS_NAND_USE_FLASH_BBT=y
 CONFIG_NAND_MXS=y
 CONFIG_NAND_MXS_DT=y