MCU dropdown should not affect dfu-programmer behavior

[skullydazed]

When we're using dfu-programmer we know what kind of MCU is attached. The MCU dropdown should be ignored when building a dfu-programmer command, and we should always use the vid/pid detection to determine mcu.

Feature Request Type

• Core functionality
• Alteration (enhancement/optimization) of existing feature(s)
• New behavior

Description

[nooges]

Some VID/PID pairs listed here: http://ww1.microchip.com/downloads/en/devicedoc/doc7618.pdf

[skullydazed]

We had this functionality in the old qmk firmware flasher and the list of pid's that used is here: https://github.com/qmk/qmk_flasher/blob/master/src/MainWindow/app.js#L15