Bluetooth: Fix invalid length check in l2cap_information_rsp()

The length check is invalid since the length varies with type of
info response.

This was introduced by the commit
cb3b3152b2f5939d67005cff841a1ca748b19888

Because of this, l2cap info rsp is not handled and command reject is
sent.

    > ACL data: handle 11 flags 0x02 dlen 16
            L2CAP(s): Info rsp: type 2 result 0
              Extended feature mask 0x00b8
                Enhanced Retransmission mode
                Streaming mode
                FCS Option
                Fixed Channels
    < ACL data: handle 11 flags 0x00 dlen 10
            L2CAP(s): Command rej: reason 0
              Command not understood