Added info on the buffer count limit in SceCtrl.
Added info on the buffer count limit in SceCtrl.

Only 64 buffers can be handled by the user functions, as that is as many as the static memory blocks they use can take. The error `SCE_CTRL_ERROR_INVALID_ARG` will be returned if more than 64 buffers is requested.

Rinnegatamante/vita-headers,Rinnegatamante/vita-headers,Rinnegatamante/vita-headers,vitasdk/vita-headers,Rinnegatamante/vita-headers,vitasdk/vita-headers,vitasdk/vita-headers,vitasdk/vita-headers