[Bug 209328] ifconfig wlan0 country JP cannot work on iwn(N-6300)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209328

            Bug ID: 209328
           Summary: ifconfig wlan0 country JP cannot work on iwn(N-6300)
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: wireless
          Assignee: freebsd-wireless at FreeBSD.org
          Reporter: ish at amail.plala.or.jp

My PC (dell studio 1558) has N-6300 (iwn driver with iwn6000g2bfw.ko).

'ifconfig wlan0 country JP' is working on 10.3-RELEASE, but isn't working on
11-current (r298976) with message 'iwn0: iwn_setregdomain: invalid channel 8
freq 2447/0x20480'.
Other country (for example, us, de, etc.) is working on 11-current.

N-6300 has 112 nchan when country JP,iwn_setregdomain in if_iwn.c failed
iwn_find_eeprom_channel(sc, c) with only 4 nchan. (invalid channel 8 freq
2447/0x20480, invalid channel 9 freq 2452/0x20480, invalid channel 12 freq
2467/0x40480, invalid channel 13 freq 2472/0x40480).

I don't know cause.

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