Add CAN drivers by default to AGL boards

Add CAN drivers by default to AGL boards

v2 (jsmoeller): Add append files for boards that need special handling.

Change-Id: I172b71be6e825aa6399f22899e9b6eaacc86e72b
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>
Signed-off-by: Jan-Simon Möller <jsmoeller@linuxfoundation.org>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/9791
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-build: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
Reviewed-by: Stéphane Desneux <stephane.desneux@iot.bzh>