ath10k-firmware: QCA9888 hw2.0: Add TP-Link Archer C6 v2 (US) / A6 v2 (US/TW) specific BDFs

[Adam Elyas Aliasaa]

Hello,

I wish to submit a specific BDF for this device.

The device have two names: TP-Link Archer C6 v2 (US), and TP-Link Archer A6 v2 (US/TW). They are identical, and has been supported by OpenWRT since 2019. Unfortunately, the 5GHz radio suffers from low RSSI. It seems that the radio components were changed substantially that the stock values in board-2.bin doesn't work well with it. Replacing the default board file with the one included in stock firmware fixes the 5GHz range.

> description for what hardware this is

It is a QCA9563 based board, consisting of one QCA9563 radio used for 2.4GHz WLAN, and one QCA9886 radio used for 5GHz WLAN.

> origin of the board file (did you create it yourself or where you downloaded)

I pulled it off the latest stock firmware image, from '/lib/firmware/QCA9888/hw.2/boardData_2_0_QCA9888_5G_YA105_us.bin'.

> ids to be used with the board file (ATH10K_BD_IE_BOARD_NAME in ath10k)

I'd suggest:
bus=pci,bmi-chip-id=0,bmi-board-id=24,variant=tp-link-archer-c6-v2-us

Which is based off the console log after I intentionally replaced the board-2.bin with an invalid one:
[   14.965856] ath10k_pci 0000:00:00.0: failed to fetch board data for bus=pci,bmi-chip-id=0,bmi-board-id=24 from ath10k/QCA9888/hw2.0/board-2.bin

> attach the actual board file (board.bin)

As attached. I left the original file name as is.

File name: boardData_2_0_QCA9888_5G_YA105_us.bin
sha256 sum: 10ef67f14bab5d565ce777f7c852124acbfe4cd7e04a06d548f110201553dd25

Thank you.

Kind regards,
Adam E.
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