Description

In LLDP for port id , instead of interface name ,mac address is advertised

Steps to reproduce the issue:

1. Check for LLDP information in peer device

Describe the results you received:
In Peer Arista VM :

ARISTA01T1#show lldp neighbors
Last table change time : 1:55:32 ago
Number of table inserts : 19
Number of table deletes : 18
Number of table drops : 0
Number of table age-outs : 9

Port Neighbor Device ID Neighbor Port ID TTL
Et1 sonic-s6100-01 4c76.25f4.7081 120
ARISTA01T1#

Describe the results you expected:
The sonic DUT should be advertising interface name as the port id.

**Additional information **

Output of show version sonic DUT:

Build : buildimage-brcm-stretch-all 138

root@sonic-s6100-01:~# show ver
SONiC Software Version: SONiC.HEAD.138-b0b8d69
Distribution: Debian 9.4
Kernel: 4.9.0-5-amd64
Build commit: b0b8d69
Build date: Mon Mar 12 13:03:50 UTC 2018
Built by: johnar@jenkins-worker-4

Docker images:
REPOSITORY TAG IMAGE ID SIZE
docker-syncd-brcm HEAD.138-b0b8d69 d92b77a90440 331.6 MB
docker-syncd-brcm latest d92b77a90440 331.6 MB
docker-orchagent-brcm HEAD.138-b0b8d69 ae0ca94d991a 260.5 MB
docker-orchagent-brcm latest ae0ca94d991a 260.5 MB
docker-lldp-sv2 HEAD.138-b0b8d69 0451d4fe2056 270.7 MB
docker-lldp-sv2 latest 0451d4fe2056 270.7 MB
docker-dhcp-relay HEAD.138-b0b8d69 d1c0ab97120f 253.6 MB
docker-dhcp-relay latest d1c0ab97120f 253.6 MB
docker-database HEAD.138-b0b8d69 175362bcb375 252.3 MB
docker-database latest 175362bcb375 252.3 MB
docker-teamd HEAD.138-b0b8d69 d6911b887ad9 257.6 MB
docker-teamd latest d6911b887ad9 257.6 MB
docker-snmp-sv2 HEAD.138-b0b8d69 03312ccf30c8 292 MB
docker-snmp-sv2 latest 03312ccf30c8 292 MB
docker-router-advertiser HEAD.138-b0b8d69 5400a265ea98 250 MB
docker-router-advertiser latest 5400a265ea98 250 MB
docker-platform-monitor HEAD.138-b0b8d69 56e07878c4d7 271.9 MB
docker-platform-monitor latest 56e07878c4d7 271.9 MB
docker-fpm-quagga HEAD.138-b0b8d69 94b4ade9f44d 264.1 MB
docker-fpm-quagga latest 94b4ade9f44d 264.1 MB