wifi: ath11k: Disable Spectral scan upon removing interface

Host might receive spectral events during interface
down sequence and this might create below errors.

failed to handle dma buf release event -22
failed to handle dma buf release event -22

Fix this by disabling spectral config during remove interface.

Tested-on: IPQ5018 hw1.0 AHB WLAN.HK.2.6.0.1-00861-QCAHKSWPL_SILICONZ-1
Signed-off-by: Tamizh Chelvam Raja <quic_tamizhr@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20230328071150.29645-1-quic_tamizhr@quicinc.com

drivers/net/wireless/ath/ath11k/mac.c

@@ -6685,6 +6685,11 @@ static void ath11k_mac_op_remove_interface(struct ieee80211_hw *hw,
 	ath11k_dbg(ab, ATH11K_DBG_MAC, "mac remove interface (vdev %d)\n",
 		   arvif->vdev_id);
 
+	ret = ath11k_spectral_vif_stop(arvif);
+	if (ret)
+		ath11k_warn(ab, "failed to stop spectral for vdev %i: %d\n",
+			    arvif->vdev_id, ret);
+
 	if (arvif->vdev_type == WMI_VDEV_TYPE_STA)
 		ath11k_mac_11d_scan_stop(ar);