stm32mp: stm32prog: add MTD devices support

Add support of MTD device (DFU_MTD backend) for
NOR, NAND or SPI-NAND target.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/arch/arm/mach-stm32mp/Kconfig b/arch/arm/mach-stm32mp/Kconfig
index bf573ac..6fed2c6 100644
--- a/arch/arm/mach-stm32mp/Kconfig
+++ b/arch/arm/mach-stm32mp/Kconfig
@@ -114,7 +114,9 @@
 	select DFU_VIRT
 	select PARTITION_TYPE_GUID
 	imply CMD_GPT if MMC
+	imply CMD_MTD if MTD
 	imply DFU_MMC if MMC
+	imply DFU_MTD if MTD
 	help
 		activate a specific command stm32prog for STM32MP soc family
 		witch update the device with the tools STM32CubeProgrammer,