mac80211: fix MT7620 Wi-Fi channel scanning function

mac80211: fix MT7620 Wi-Fi channel scanning function

During the channel scanning process, the driver will continuously
switch channels. It seems that the full RF calibration step in
rt2800_config_channel() caused the channel scanning function to
timeout. To fix it, move the RF calibration to rt2800_enable_radio()
so that it is only executed once. This commit also includes some
coding format adjustments to follow the Linux recommended style.

Fixes: 2824fa6963cf ("mac80211: rework MT7620 PA/LNA RF calibration")
Signed-off-by: Shiji Yang <yangshiji66@qq.com>
(cherry picked from commit ce6ad123e76311d2a882054b4ea532d1bfb643c8)