s3: smbd: Remove lock_flav argument from smbd_smb1_do_locks_send().

s3: smbd: Remove lock_flav argument from smbd_smb1_do_locks_send().

And also inside struct smbd_smb1_do_locks_state.
All calls to this always (a) have one or more locks of the same type.
(the setup for smbd_smb1_do_locks_send() ensures there is always
at least one lock) and (b) always set locks[0].lock_flav correctly before calling.

lock_flav is thus a redundent argument. Removing it means
we can never drift out of sync with the lock_flav element
in the passed in locks array.

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Noel Power <npower@samba.org>