Hooking up MIDI output from soundboard

[gm-matthew]

Used by Magical Truck Adventure to check region code; ROM in Games.xml is Export version, not Japan.

The patch to enable region change is no longer required and has been removed. A new patch to set the region to Japan has been added but commented out to disable it by default.

I don't really like how I have hardcoded the MIDI FIFO sizes in CheckMIDIStatus(); I think adding functions to SCSP.cpp such as SCSP_MidiInFull() and SCSP_MidiOutEmpty() would be a cleaner way to do it. Thoughts?