lockd: Drop locks_init_lock() from nlm4_lock_to_lockd_lock()

lockd: Drop locks_init_lock() from nlm4_lock_to_lockd_lock()

The NLMv4 GRANTED helper passes the wrapper's lock to
nlmclnt_grant(), which compares only fl_start, fl_end, svid, and
fh, and the shared nlmclnt_lock_event tracepoint now sources its
byte-range fields from fl_start and fl_end as well. Both fl_start
and fl_end are set unconditionally by lockd_set_file_lock_range4()
on the line below, so the locks_init_lock() call left no observable
effect: every other field of struct file_lock is unread on the
GRANTED path.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>