Comment # 17 on bug 1179308 from Dr. Werner Fink

this could be a problem with the firmware and/or kernel driver modul:

[   36.903630] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43430-sdio
for chip BCM43430/1
[   36.903797] brcmfmac: brcmf_c_process_clm_blob: no clm_blob available
(err=-2), device may have limited channels available
[   36.904454] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM43430/1 wl0: Oct
23 2017 03:55:53 version 7.45.98.38 (r674442 CY) FWID 01-e58d219f


... ``device may have limited channels available������

Inersting the cfg80211 module also works in x86 without using crda

 lsmod | grep cfg80211
 cfg80211              827392  3 iwlmvm,iwlwifi,mac80211
 rfkill                 28672  7 bluetooth,cfg80211

and nevertheless the iwlwifi does know about chanel 12 and 13 for DE and
disable only channel 14.

 iw reg get
 global
 country 00: DFS-UNSET
         (2402 - 2472 @ 40), (N/A, 20), (N/A)
        (2457 - 2482 @ 20), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
        (2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, PASSIVE-SCAN
        (5170 - 5250 @ 80), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
        (5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, AUTO-BW, PASSIVE-SCAN
        (5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, PASSIVE-SCAN
        (5735 - 5835 @ 80), (N/A, 20), (N/A), PASSIVE-SCAN
        (57240 - 63720 @ 2160), (N/A, 0), (N/A)

 phy#0 (self-managed)
 country DE: DFS-UNSET
        (2402 - 2437 @ 40), (6, 22), (N/A), AUTO-BW, NO-HT40MINUS, NO-80MHZ,
NO-160MHZ
        (2422 - 2462 @ 40), (6, 22), (N/A), AUTO-BW, NO-80MHZ, NO-160MHZ
        (2447 - 2482 @ 40), (6, 22), (N/A), AUTO-BW, NO-HT40PLUS, NO-80MHZ,
NO-160MHZ
 [....]

how does this *self-managed* work?`