CC1120 and RF output pin and network
More than likely the PA output is an open-collector BJT therefore it needs a DC path to Vcc BUT that path has to be via a choke so that the AC signal produced by the PA is not attenuated. The 10 ohm resistor in series with the inductor is probably there for some current limiting on the internal BJT. C171 and 172 are more than likely de-couplers.