Apply port-number changes to olt-agent

in translation.cc the portno in agent is calculated by the composition of port type and int_id as below:
int interface_key_to_port_no(bcmolt_interface_id intf_id,
bcmolt_interface_type intf_type) {
if (intf_type == BCMOLT_INTERFACE_TYPE_NNI)

{ return (0x1 << 20) + intf_id; }

if (intf_type == BCMOLT_INTERFACE_TYPE_PON)

{ return (0x2 << 28) + intf_id; }

return intf_id;
}

The calculated port number is used in LosIndication and PortStats. This function should be changed according to new changes. The 20 bit for NNI should be changed to 24.
Note: Instead of generating a port number from port type and port id, It should be considered to change the interface to a

{porty_type, port_id}

structure, so remove this function totally.