Fixup gsp synch

Fixes issues with GSP synchronization. This is mostly experimental work that has been a result of trial and error, so I can't guarantee accuracy. However, I can assert the following:
* All known applications that worked (to my knowledge) still work
* Fixes the loading animation in Cubic Ninja
* Cave Story 3D runs 10X faster, and gets past the opening logos
* Other games (while not showing additional gfx) seem to no longer hang (e.g. Cubic Ninja, Cave Story 3D, Reto City Rampage)
Might want to add a TODO/NOTE saying that this number probably is purely empirical.