client: don't take extra target inode reference in ll_link

client: don't take extra target inode reference in ll_link

For the life of me, I can't figure out where this reference is ever put.
We usually take a reference like this when there is an Inode **
parameter that we'll return to the caller. ll_link doesn't have one of
those, so as best I can tell this reference is just leaked.

Zheng however says that FUSE will eventually put this reference via
ll_forget. I still don't quite get how that works, but the other callers
clearly do not handle this correctly. Change the code to only make the
fuse code take this extra reference.

Signed-off-by: Jeff Layton <jlayton@redhat.com>