mtd: rename CONFIG_MTD_DEVICE -> CONFIG_MTD

Like in Linux, just use CONFIG_MTD to compile the MTD stack.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
diff --git a/configs/pfla02_defconfig b/configs/pfla02_defconfig
index e824d4c..c2cc796 100644
--- a/configs/pfla02_defconfig
+++ b/configs/pfla02_defconfig
@@ -51,6 +51,7 @@
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_DM=y
 CONFIG_FSL_USDHC=y
+CONFIG_MTD=y
 CONFIG_DM_MTD=y
 CONFIG_MTD_RAW_NAND=y
 CONFIG_NAND_MXS=y