iwlwifi: initialize rx_status

The vendor radiotap patch added a few fields to
struct ieee80211_rx_status that need to be zero,
initialize the struct instead of using whatever
was left on the stack.

Reviewed-by: Emmanuel Grumbach <[e-mail]>
Signed-off-by: Johannes Berg <[e-mail]>
Tested-by: Kalle Valo <[e-mail]>
Signed-off-by: John W. Linville <[e-mail]>

drivers/net/wireless/iwlwifi/dvm/rx.c

···
 			    struct iwl_device_cmd *cmd)
 {
 	struct ieee80211_hdr *header;
-	struct ieee80211_rx_status rx_status;
+	struct ieee80211_rx_status rx_status = {};
 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
 	struct iwl_rx_phy_res *phy_res;
 	__le32 rx_pkt_status;