[BLUETOOTH]: put_device before device_del fix

Because of workqueue delay, the put_device could be called before
device_del, so move it to del_conn.

Signed-off-by: Dave Young <hidave.darkstar@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc net/bluetooth/hci_conn.c
Simple merge

diff --cc net/bluetooth/hci_sysfs.c
Simple merge