4-FSK 115 kBaud is possible, but I do not know if this will meet the regulations as the deviation needs to be wide and this is in conflict with a 200 kHz channel bandwidth.
Assuming the channel spacing is 200 kHz you need an RX filter BW equal or less than 200 kHz. CC1101 can do 203 kHz RX filter BW. This puts an upper limit on the data rate and/or frequency BW (signal BW needs to be less than the RX filter BW). Try with the 76.8 kBaud "typicl settings" in SmartRF Studio and change chnage the RX filter BW from 232 kHz to 203 kHz.