ath11k: fix FCS_ERR flag in radio tap header

In radio tap header, BAD FCS flag is not updated properly because
driver failed to update FCS_ERR flag in monitor mode.

In rx_desc, FCS_ERR information is available in rx_attention
structure and presence of this field indicates corresponding frame
failed FCS check.

Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.4.0.1-01695-QCAHKSWPL_SILICONZ-1

Signed-off-by: P Praneesh <quic_ppranees@quicinc.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1635164060-18423-1-git-send-email-quic_ppranees@quicinc.com