Add TP-Link Archer C7 v2 (a very common device)

[systemcrash]

Routers details:
{
    "kernel": "5.15.167",
    "hostname": "darkstar",
    "system": "Qualcomm Atheros QCA9558 ver 1 rev 0",
    "model": "TP-Link Archer C7 v2",
    "board_name": "tplink,archer-c7-v2",
    "rootfs_type": "squashfs",
    "release": {
        "distribution": "OpenWrt",
        "version": "23.05.5",
        "revision": "r24106-10cc5fcd00",
        "target": "ath79/generic",
        "description": "OpenWrt 23.05.5 r24106-10cc5fcd00"
    }
}
Connecting to host 169.254.200.2, port 4242
[  5] local 169.254.200.1 port 57420 connected to 169.254.200.2 port 4242
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  4.50 MBytes  37.7 Mbits/sec    0    199 KBytes
[  5]   1.00-2.00   sec  4.38 MBytes  36.7 Mbits/sec    0    238 KBytes
[  5]   2.00-3.00   sec  4.12 MBytes  34.6 Mbits/sec    0    262 KBytes
[  5]   3.00-4.00   sec  4.12 MBytes  34.6 Mbits/sec    0    275 KBytes
[  5]   4.00-5.00   sec  4.38 MBytes  36.7 Mbits/sec    0    297 KBytes
[  5]   5.00-6.00   sec  4.00 MBytes  33.6 Mbits/sec    0    297 KBytes
[  5]   6.00-7.00   sec  4.25 MBytes  35.6 Mbits/sec    0    314 KBytes
[  5]   7.00-8.00   sec  4.12 MBytes  34.6 Mbits/sec    0    314 KBytes
[  5]   8.00-9.00   sec  4.00 MBytes  33.6 Mbits/sec    0    314 KBytes
[  5]   9.00-10.00  sec  4.12 MBytes  34.6 Mbits/sec    0    314 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  42.0 MBytes  35.2 Mbits/sec    0             sender
[  5]   0.00-10.02  sec  41.4 MBytes  34.7 Mbits/sec                  receiver

iperf Done.
4242/tcp:            10757