Beamforming is used for directional signal transmission/reception.
Beamformee plays the role for signal reception, and makes the RX
performance better in middle distance range.
Implement beamformee related callbacks for 8821c.
Since 8821c only support 1ss rate, nc_index in beamformee setting
needs to be adjusted based on the capability.
The TX power requires to be adjusted based on the thermal value.
The actual power will decrease if the thermal value raised, and
will increase if the thermal value lowered. Driver comapres the
thermal value, as moving averages. If it changes over a limit,
driver will modify the TX power index to compensate.
CCK PD can reduce the number of false alarm of the CCK rates.
It dynamically adjusts the power threshold and CS ratio.
The values are compared to the values of the previous level, if
the level is changed, set new values of power threshold and CS
ratio.
In order to get a better TX EVM, do calibration after association.
The calibration needed for 8821c is the IQK, which is done in the
firmware. Implement the rtw_chip_ops::phy_calibration() to trigger
firmware to calibrate.
