wifi: rtl8xxxu: Enable hw seq for mgmt/non-QoS data frames

Beacon frames are generated by the HW and therefore contain a HW
generated seq number. Enable HW sequence number for other frames to
match that.
mac80211 will tell us via IEEE80211_TX_CTL_ASSIGN_SEQ when that is
necessary.

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/20230428150833.218605-14-martin.kaistra@linutronix.de