wifi: rtl8xxxu: Add parameter force to rtl8xxxu_refresh_rate_mask

In AP mode, when multiple STAs connect to us, we need to set an initial
rate mask for each of them. This initialisation should happen regardless
of the rssi_level saved in the priv struct.

Add a parameter called force to rtl8xxxu_refresh_rate_mask() which will
be used for this initialisation.

Signed-off-by: Martin Kaistra <martin.kaistra@linutronix.de>
Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230428150833.218605-10-martin.kaistra@linutronix.de