Code review comment for ~paul-meyer/cloud-init:fix-ntfs-mount

I think we can narrow down the check to just: 1) is the module loaded 2) do we have a mount.ntfs

I'll ask smoser to comment w.r.t the case where we have mount.ntfs (and module is present but not loaded, the modinfo case returns true) if that's something we care about; unless mount.ntfs will attempt to modprobe the ntfs module then cloud-init isn't currently modprobing that before calling mount.