dfu: add dependency on the raw NAND core

CONFIG_DFU_NAND needs the raw NAND core being compiled.

Also fix the colibri_vf defconfig to reflect this dependency.
Signed-off-by: NMiquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: NBoris Brezillon <boris.brezillon@bootlin.com>

configs/colibri_vf_defconfig

@@ -68,6 +68,7 @@ CONFIG_NAND_VF610_NFC=y
 CONFIG_NAND_VF610_NFC_DT=y
 CONFIG_SYS_NAND_VF610_NFC_60_ECC_BYTES=y
 CONFIG_MTD=y
+CONFIG_MTD_RAW_NAND=y
 CONFIG_MTD_UBI=y
 CONFIG_MTD_UBI_FASTMAP=y
 CONFIG_PHYLIB=y

drivers/dfu/Kconfig

@@ -31,6 +31,7 @@ config DFU_MMC
 config DFU_NAND
 	bool "NAND back end for DFU"
 	depends on CMD_MTDPARTS
+	depends on MTD_RAW_NAND
 	help
 	  This option enables using DFU to read and write to NAND based
 	  storage.