The other required set of changes

As per the PR, the changes still holding it up.
Add onekey for testing.
Fix ARM builds.
Fix device descriptor when either axes or buttons is zero.
Add compile-time check for at least one axis or button.
Move definition to try to fix conflict.
PR review comments.
qmk cformat

quantum/quantum.h

@@ -142,6 +142,10 @@ extern layer_state_t layer_state;
 #    include "process_magic.h"
 #endif
 
+#ifdef JOYSTICK_ENABLE
+#    include "process_joystick.h"
+#endif
+
 #ifdef GRAVE_ESC_ENABLE
 #    include "process_grave_esc.h"
 #endif