wcn36xx: set default BTLE coexistence config

If the value for the firmware configuration parameters
BTC_STATIC_LEN_LE_BT and BTC_STATIC_LEN_LE_WLAN are not set the duty
cycle between BT and WLAN is such that if BT (including BLE) is active
WLAN gets 0 bandwidth. When tuning these parameters having a too high
value for WLAN means that BLE performance degrades.
The "sweet" point of roughly half of the maximal values was empirically
found to achieve a balance between BLE and Wi-Fi coexistence
performance.

Signed-off-by: Eyal Ilsar <eilsar@codeaurora.org>
Signed-off-by: Ramon Fried <rfried@codeaurora.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

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

@@ -73,6 +73,8 @@ static struct wcn36xx_cfg_val wcn36xx_cfg_vals[] = {
 	WCN36XX_CFG_VAL(TX_PWR_CTRL_ENABLE, 1),
 	WCN36XX_CFG_VAL(ENABLE_CLOSE_LOOP, 1),
 	WCN36XX_CFG_VAL(ENABLE_LPWR_IMG_TRANSITION, 0),
+	WCN36XX_CFG_VAL(BTC_STATIC_LEN_LE_BT, 120000),
+	WCN36XX_CFG_VAL(BTC_STATIC_LEN_LE_WLAN, 30000),
 	WCN36XX_CFG_VAL(MAX_ASSOC_LIMIT, 10),
 	WCN36XX_CFG_VAL(ENABLE_MCC_ADAPTIVE_SCHEDULER, 0),
 };