NFC: double unlock in nfc_llcp_recv_connect()

We unlock inside the if block on the other side of this if else
statement.  It could result in calling mutex_unlock() twice.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>