wcn36xx: Silence error about unsupported smd event 188

Sometimes the firmware sends a HAL_DEL_BA_IND, the prima driver silently
ignore this message so let's do the same to silence the error message.

Cc: Nicolas Dechesne <nicolas.dechesne@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/wcn36xx/smd.c

@@ -2229,6 +2229,7 @@ static void wcn36xx_smd_rsp_process(struct wcn36xx *wcn, void *buf, size_t len)
 
 	case WCN36XX_HAL_COEX_IND:
 	case WCN36XX_HAL_AVOID_FREQ_RANGE_IND:
+	case WCN36XX_HAL_DEL_BA_IND:
 	case WCN36XX_HAL_OTA_TX_COMPL_IND:
 	case WCN36XX_HAL_MISSED_BEACON_IND:
 	case WCN36XX_HAL_DELETE_STA_CONTEXT_IND:
@@ -2275,6 +2276,7 @@ static void wcn36xx_ind_smd_work(struct work_struct *work)
 
 	switch (msg_header->msg_type) {
 	case WCN36XX_HAL_COEX_IND:
+	case WCN36XX_HAL_DEL_BA_IND:
 	case WCN36XX_HAL_AVOID_FREQ_RANGE_IND:
 		break;
 	case WCN36XX_HAL_OTA_TX_COMPL_IND: