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/odroid-xu3_defconfig b/configs/odroid-xu3_defconfig
index 24d2113..20038d4 100644
--- a/configs/odroid-xu3_defconfig
+++ b/configs/odroid-xu3_defconfig
@@ -40,6 +40,7 @@
 CONFIG_DFU_MMC=y
 CONFIG_SUPPORT_EMMC_BOOT=y
 CONFIG_MMC_DW=y
+CONFIG_MTD=y
 CONFIG_SMC911X=y
 CONFIG_SMC911X_BASE=0x5000000
 CONFIG_DM_PMIC=y