danielinux/gadget-kempston: Convert old Kempston Joysticks to USB @ 1ea284a8a86cf4f459787aafaecbc7dc5ebd03a0

Daniele Lacamera 1ea284a8a8 Initial import: kempston mod pinout		6 月之前
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llvm	1ea284a8a8 Initial import: kempston mod pinout	6 月之前
CMakeLists.txt	1ea284a8a8 Initial import: kempston mod pinout	6 月之前
pico_double_test.c	1ea284a8a8 Initial import: kempston mod pinout	6 月之前
pico_float_test.c	1ea284a8a8 Initial import: kempston mod pinout	6 月之前