The Motorola Scalable Controller Area Network (MSCAN) definition is based on the MSCAN12 definition which is the specific implementation of the Motorola Scalable CAN concept targeted for the Motorola MC68HC12 Microcontroller Family.
If you say yes here you get support for Freescale's MPC5xxx onboard CAN controller. Currently, the MPC5200, MPC5200B and MPC5121 (Rev. 2 and later) are supported. This driver can also be built as a module. If so, the module will be called mscan-mpc5xxx.ko.