For systemd, there is not a fuse.service since systemd provides
sys-fs-fuse-connections.mount to mount the fuse control filesystem, so
instead, only fuse3.conf is added to modules-load.d to load the required
fuse kernel module.

Signed-off-by: Changqing Li <changqing.li@windriver.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>