ath11k-firmware: QCN9074 hw1.0: add Ubiquiti UniFi U6 Enterprise

[Andrei-Alexandru Bleortu]

Hi,

please add these two board files to ath11k/QCN9074/hw1.0/board-2.bin.

Hardware: the Ubiquiti UniFi U6 Enterprise, an IPQ5018 access point
with two QCN9074 radios on PCIe, one on 5 GHz and one on 6 GHz. Both
report qmi-board-id 255, so they are told apart by variant.

Origin: bdwlan.ba3 (5 GHz) and bdwlan.ba4 (6 GHz) from the vendor
firmware for this model (/lib/firmware/platforms/a654/), unmodified:
the vendor device tree gives the two radios board_id 0xa3 and 0xa4.

The variants are the qcom,calibration-variant of the radios in the
board's device tree, submitted to linux-arm-msm ("arm64: dts: qcom:
ipq5018: add Ubiquiti UniFi U6 Enterprise").

Board names and md5sums:
  bus=pci,qmi-chip-id=0,qmi-board-id=255,variant=Ubiquiti-U6-Enterprise-5G
    md5 ab61338d4fa9f555247f41d41053fc31
  bus=pci,qmi-chip-id=0,qmi-board-id=255,variant=Ubiquiti-U6-Enterprise-6G
    md5 d76d5971f35a8ed868de2d2799622ce2

Tested with WLAN.HK.2.9.0.1-02146-QCAHKSWPL_SILICONZ-1 on Linux 7.2:
both radios come up under ath11k with this board data; a client on the
6 GHz radio (160 MHz) reached 1.5-1.6 Gbit/s through the AP.

The submission was prepared with an AI coding assistant (Claude Code);
the board files are the vendor's, unmodified, and the testing above
was done on the device.

Andrei
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