t's not a big problem, but it makes a better show in 'ip link show' on
CAN interfaces :-)

I also moved __PF(CAN,can) in ll_proto.c to the same position where it
can be found in if_ether.h .

The only thing i did not know if the __PF(CAN,can) in ll_types.c needs
to be put in #ifdef ARPHDR_CAN like __PF(HWX25,hwx25) is or not. You
definitely know that better than me.