With matrix_power_down() in suspend event HHKB JP doesn't start up for some reason.
It is unneeded in actual and removed.

Old console sent unneeded empty data every one milli sencond.
After this fix console flushes endpoint data bank every 50ms only when needed.

This reverts commit c17b8a599e.

The commit made compile error and its intention is unclear.

Adding the makefile options ADB_MOUSE_ENABLE and ADB_MOUSE_ACCMAX.
Might have gone overboard with comments, and tried but failed at not
adding more than necessary outside the converter/adb_usb/ folder.

Keypresses would be forgotten if they began while ghosting, even if they
were still pressed after ghosting ended.