spl-linux 0.6.5.11-1ubuntu2 ADT test failure with linux 4.15.0-1.2 [error: ‘struct timer_list’ has no member named ‘data’]

[Seth Forshee]

Testing failed on:
    amd64: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-bionic-canonical-kernel-team-bootstrap/bionic/amd64/s/spl-linux/20171212_032604_3e504@/log.gz
    arm64: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-bionic-canonical-kernel-team-bootstrap/bionic/arm64/s/spl-linux/20171212_012332_3e504@/log.gz
    i386: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-bionic-canonical-kernel-team-bootstrap/bionic/i386/s/spl-linux/20171212_025506_3e504@/log.gz
    ppc64el: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-bionic-canonical-kernel-team-bootstrap/bionic/ppc64el/s/spl-linux/20171212_030031_3e504@/log.gz
    s390x: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-bionic-canonical-kernel-team-bootstrap/bionic/s390x/s/spl-linux/20171212_030721_3e504@/log.gz