ath11k WCN6855 seems to have incorrect regulatory info for US DFS-FCC (no 6ghz)

[James Prestwood]

Hi,

I'm using the latest firmware for ath11k [1], WCN6855 hw2.1, and so far 
I guess we've been lucky that the regdom has always been set to 00, 
which apparently allows 6ghz. But recently we have seen the regdom get 
set to US and it then has 6ghz disabled:

phy#0 (self-managed)
country US: DFS-FCC
     (2402 - 2472 @ 40), (6, 30), (N/A)
     (5170 - 5250 @ 80), (6, 24), (N/A), AUTO-BW
     (5250 - 5330 @ 80), (6, 24), (0 ms), DFS, AUTO-BW
     (5490 - 5730 @ 160), (6, 24), (0 ms), DFS, AUTO-BW
     (5735 - 5855 @ 80), (6, 30), (N/A), AUTO-BW
     (5855 - 5925 @ 40), (6, 30), (N/A), NO-OUTDOOR, AUTO-BW

I have updated the regulatory.db from wireless-regdb.git as well, and 
updated all the firmware (including regdb.bin) to the latest available. 
According to the wireless-regdb tree, US: DFS-FCC _should_ allow 6ghz [2]:

Is there something I'm missing here?

Thanks,

James

[1] 
https://git.codelinaro.org/clo/ath-firmware/ath11k-firmware/-/tree/main/WCN6855?ref_type=heads

[2] 
https://git.kernel.org/pub/scm/linux/kernel/git/wens/wireless-regdb.git/tree/db.txt#n1895