wcn36xx: Update dtim period before starting BSS

The dtim period sent to FW was 0 because the dtim period
was never set. This caused an incorrect dtim count to be sent in
beacons.

Signed-off-by: Pontus Fuchs <pontus.fuchs@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c
index dca21ee..4ab5370 100644
--- a/drivers/net/wireless/ath/wcn36xx/main.c
+++ b/drivers/net/wireless/ath/wcn36xx/main.c
@@ -708,6 +708,7 @@
 			    bss_conf->enable_beacon);
 
 		if (bss_conf->enable_beacon) {
+			vif_priv->dtim_period = bss_conf->dtim_period;
 			vif_priv->bss_index = 0xff;
 			wcn36xx_smd_config_bss(wcn, vif, NULL,
 					       vif->addr, false);