Adding Flexcan driver support on Kernel
On kernel menuconfig, add the following items:
[*] Networking support --->
<*> CAN bus subsystem support --->
<*> Raw CAN Protocol (raw access with CAN-ID filtering)
<*> Broadcast Manager CAN Protocol (with content filtering)
CAN Device Drivers --->
<*> Virtual Local CAN Interface (vcan)
[*] CAN devices debugging messages
<*> Freescale FlexCAN