can: Optimize can interface
can: Optimize can interface

Using printfs when a frame error occurs would lead to more frame errors, since the increased time for the printf would cause a buffer underrun.

Also an error during init is very unlikely to occur, this should be cheked on the return value, not by printfs

Furthermore the pbuf timeout value have been decreased from 10 seconds to 1 second.

libcsp/libcsp,satlab/libcsp,libcsp/libcsp,GomSpace/libcsp,satlab/libcsp,GomSpace/libcsp,GomSpace/libcsp,satlab/libcsp