Add Sega SP game export option

[rcampbel3]

Can you add a "Sega SP" export option as well? see: https://www.dreamcast-talk.com/forum/viewtopic.php?t=13780

[Voljega]

I had actually added it but removed it because none one the games on this system are any good, they are either games unplayable with a regular controller or kid games / redemption games

https://segaretro.org/Sega_System_SP