qca-wireless: ipq50xx: ipq5018: add bdf for ikuai sw8

[Isaev Ruslan]

This is second bdf for the device: ikuai sw8

This one is for ipq5018 chip (stock fw: bdwlan.b24)

```
[
    {
        "board": [
            {
                "names": [
                    "bus=ahb,qmi-chip-id=0,qmi-board-id=255,variant=Ikuai-SW8"
                ],
                "data":
"bus=ahb,qmi-chip-id=0,qmi-board-id=255,variant=Ikuai-SW8.bin"
            }
        ],
        "regdb": []
    }
]
```
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