Expand bootloader target to support most AVR boards#6255

Merged

skullydazed merged 3 commits intoqmk:masterfrom drashna:feature/at90_qmk_dfu

Jul 16, 2019

+12-8

Commits on Jul 4, 2019

Update the :bootloader target to pass along correct hardware info
drashna
committed

Commits on Jul 5, 2019