zfs#25 sys-fs/zfs-kmod-9999: Don't depend on spl
Cherry-pick https://github.com/gentoo/gentoo/commit/3793c997a2091476b33ad8a65ac1011676752dac that makes zfs-kmod build after spl is merged into the zfs tree.
Cherry-pick https://github.com/gentoo/gentoo/commit/3793c997a2091476b33ad8a65ac1011676752dac that makes zfs-kmod build after spl is merged into the zfs tree.