wifi: iwlwifi: fix uninitialized variable warning

From: sunliming <[email protected]>

Fix below kernel warning:
drivers/net/wireless/intel/iwlwifi/mld/mac80211.c:513:16: warning: variable 'ret' is uninitialized when used here [-Wuninitialized]

---
 drivers/net/wireless/intel/iwlwifi/mld/mac80211.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 6851064b82da..7146116b067c 100644
@@ -475,7 +475,7 @@ static
 int iwl_mld_mac80211_start(struct ieee80211_hw *hw)
 {
 	struct iwl_mld *mld = IWL_MAC80211_GET_MLD(hw);
-	int ret;
+	int ret = 0;
 	bool in_d3 = false;
 
 	lockdep_assert_wiphy(mld->wiphy);

2.25.1