NAN: Fix to make NAN ranging subscribe request passive

Sending active req does not give chance for other NAN frames
to go out over the air in time.

Fix by changing the NAN ranging request subscribe update to a
passive request as it is not required to send active subscribe
req frames as part of NAN ranging request.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
diff --git a/nan.c b/nan.c
index 0a435f2..5445f15 100644
--- a/nan.c
+++ b/nan.c
@@ -961,7 +961,7 @@
 
 	memset(&req, 0, sizeof(NanSubscribeRequest));
 	req.period = 1;
-	req.subscribe_type = NAN_SUBSCRIBE_TYPE_ACTIVE;
+	req.subscribe_type = NAN_SUBSCRIBE_TYPE_PASSIVE;
 	req.serviceResponseFilter = NAN_SRF_ATTR_BLOOM_FILTER;
 	req.serviceResponseInclude = NAN_SRF_INCLUDE_RESPOND;
 	req.ssiRequiredForMatchIndication = NAN_SSI_NOT_REQUIRED_IN_MATCH_IND;