dfu: DFU_MTD depends on CMD_MTDPARTS

Function mtdparts_init() is needed for the DFU MTD driver.
Signed-off-by: NHeinrich Schuchardt <xypron.glpk@gmx.de>

drivers/dfu/Kconfig

@@ -71,6 +71,7 @@ config DFU_SF_PART
 config DFU_MTD
 	bool "MTD back end for DFU"
 	depends on DM_MTD
+	depends on CMD_MTDPARTS
 	help
 	  This option enables using DFU to read and write to on any MTD device.