lxatac-core-image-base: add dfu-util and upgrade barebox-tools

[hnez]

The barebox-tools upgrade allows us to, among other improvements, add support for i.MX8M Plus and Nano SoCs in imx-usb-loader.

The addition of dfu-util allows us to bring up some SoCs from Boot Rom (like e.b. STM32MP1).

To do before this can be merged:

• [ ] Test both tools @a3f

[a3f]

export LG_PLACE=some-imx8m-nano-board
host$ labgrid-client bootstrap $barebox
barebox$ usbgadget -D /testfile(testfile)c
host$ labgrid-client dfu download 0 testfile

Everything I tested behaved as expected. Thanks!

[Bastian-Krause]

With dfu-util we could add DFUDevice resources to the labgrid configuration.

[Bastian-Krause]

Oh, you already did that, nice :)