802.11r + 802.11k support (Fast Roaming)

[pietrodn]

Has anyone been able to enable 802.11r (Fast Roaming) support on this driver? I see that there are some defines (CONFIG_LAYER2_ROAMING, CONFIG_RTW_WNM, CONFIG_RTW_80211R, CONFIG_RTW_80211K), which are disabled by default.

I tried to enable them and compile the firmware, but I cannot get 802.11r to work: from Wireshark, I see no Mobility Domain info on the association requests and responses.
I am sure that the Wi-Fi AP supports roaming (it works with an iPhone).