Separate some define to be in a dedicated header file that will
be installed on the system. Then the low-can-generator could use it
instead of having to copy those defines in the generator code.
Change-Id: I1716c8b20f0811ca4ac1e8f13609f05ad7d24d1f Signed-off-by: Arthur Guyader <arthur.guyader@iot.bzh> Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>