Hello Tao,
Since the MCR20A transceiver is controlled trough SPI, you could use it with any MCU with SPI communication. However, if you want to do this, you would have to build your own stack which is not feasible. If you are interested in use our Freescale/NXP 802.15.4 MAC stack you should use a Kinetis MCU.
You have many Kinetis MCU options. Depending on your requirements you could use a Kinetis K64F or a Kinetis KL46Z in conjunction with the MCR20A. Also, the Kinetis KW2xD and the Kinetis KW20Z have a transceiver embedded in their packages so you would avoid the need of an external transceiver.
I widely recommend you to take a look into the Kinetis KW24D512 MCU.
Best regards,
Earl.