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/cmd/Kconfig b/cmd/Kconfig
index de92455..29df088 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -1954,7 +1954,7 @@
 
 config CMD_MTDPARTS
 	bool "MTD partition support"
-	select MTD_DEVICE if (CMD_NAND || MTD_RAW_NAND)
+	select MTD if (CMD_NAND || MTD_RAW_NAND)
 	help
 	  MTD partitioning tool support.
 	  It is strongly encouraged to avoid using this command