ath10k: set channel by command "iw" not from hostapd and DFS support of firmware-2.bin_10.1.467.2-1

[Vu Hai NGUYEN]

>Nope, CAC time is not required to start CAC (in case cac == 0 kernel
>will use default value 60s).
>What error you have EBUSY or EINVAL?
>What system (PC kernel, wireless ...) configuration?

Ah I run hostapd with debug option and got a mess that told me:
nl80211: Failed to start radar detection, device or resource busy => I guess this is EBUSY.

NGUYEN Vu Hai
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