wifi: rtw89: regd: 6 GHz power type marks default when inactive

wifi: rtw89: regd: 6 GHz power type marks default when inactive

When inactive, 6 GHz power type has been assigned to the default one,
but missed to mark the local control variable, dflt, true. Then, this
might let some 6 GHz power info of disconnected APs keep being taken
into account under certain cases.

So, mark default when inactive.

Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20251229030926.27004-12-pkshih@realtek.com