configs: qemu: enable dfu testing

For testing automated updates via dfu and mtd we need the dfu and mtd
commands as well as preboot support.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/configs/qemu_arm_defconfig b/configs/qemu_arm_defconfig
index 8a97f1b..1ffa727 100644
--- a/configs/qemu_arm_defconfig
+++ b/configs/qemu_arm_defconfig
@@ -13,25 +13,34 @@
 CONFIG_FIT_VERBOSE=y
 CONFIG_FIT_BEST_MATCH=y
 CONFIG_LEGACY_IMAGE_FORMAT=y
+CONFIG_USE_PREBOOT=y
 # CONFIG_DISPLAY_CPUINFO is not set
 # CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_PCI_INIT_R=y
 CONFIG_CMD_BOOTEFI_SELFTEST=y
 CONFIG_CMD_NVEDIT_EFI=y
+CONFIG_CMD_DFU=y
+CONFIG_CMD_MTD=y
 CONFIG_CMD_PCI=y
 CONFIG_CMD_USB=y
+CONFIG_CMD_MTDPARTS=y
 CONFIG_OF_BOARD=y
 CONFIG_ENV_IS_IN_FLASH=y
 CONFIG_ENV_ADDR=0x4000000
 CONFIG_SCSI_AHCI=y
 CONFIG_AHCI_PCI=y
 CONFIG_BLK=y
+CONFIG_DFU_TFTP=y
+CONFIG_DFU_RAM=y
+CONFIG_DFU_MTD=y
 # CONFIG_MMC is not set
+CONFIG_MTD=y
 CONFIG_DM_MTD=y
 CONFIG_MTD_NOR_FLASH=y
 CONFIG_FLASH_CFI_DRIVER=y
 CONFIG_CFI_FLASH=y
 CONFIG_SYS_FLASH_USE_BUFFER_WRITE=y
+CONFIG_FLASH_CFI_MTD=y
 CONFIG_SYS_FLASH_CFI=y
 CONFIG_DM_ETH=y
 CONFIG_E1000=y