otus: switch to ieee80211_add_channel_list_*()

[avos]

Summary

• Use device's channel list instead of default one (from ieee80211_init_channels()).
• Sort channels (ieee80211_add_channel_list_* requirement).
• Add ic_getradiocaps() method.

Test Plan

Needs testing.

[adrian]

sys/dev/otus/if_otus.c

832 ↗

(On Diff #15716)

Do you need to memset() on bands first before doing the 11n bands?

[avos]

sys/dev/otus/if_otus.c

832 ↗

(On Diff #15716)

Not for add_channel_list (there is two (2ghz and 5ghz) methods for init_channels() compatibility - which accepts 'const uint8_t bands[]' array)
Ideally it should be like 'add_channel*(..., IEEE80211_MODE_11B | IEEE80211_MODE_11G)'; however, modes are enum, not bitmask.

[avos]

sys/dev/otus/if_otus.c

832 ↗

(On Diff #15716)

The above is right for 5ghz & 2ghz bits; for 11n you should just set MODE_11NG (or MODE_11NA) bit.