iwlwifi: mvm: Change an 'else if' into an 'else' in iwl_mvm_send_add_bcast_sta

When building with -Wsometimes-uninitialized, Clang warns:

drivers/net/wireless/intel/iwlwifi/mvm/sta.c:2114:12: warning: variable
'queue' is used uninitialized whenever 'if' condition is false
[-Wsometimes-uninitialized]

Clang can't evaluate at this point that WARN(1, ...) always returns true
because __ret_warn_on is defined as !!(condition), which isn't
immediately evaluated as 1. Change this branch to else so that it's
clear to Clang that we intend to bail out here.

Link: https://github.com/ClangBuiltLinux/linux/issues/399Signed-off-by: NNathan Chancellor <natechancellor@gmail.com>
[added a few more braces]
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/mvm/sta.c

@@ -2110,12 +2110,14 @@ int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 
 	if (!iwl_mvm_has_new_tx_api(mvm)) {
 		if (vif->type == NL80211_IFTYPE_AP ||
-		    vif->type == NL80211_IFTYPE_ADHOC)
+		    vif->type == NL80211_IFTYPE_ADHOC) {
 			queue = mvm->probe_queue;
-		else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
+		} else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 			queue = mvm->p2p_dev_queue;
-		else if (WARN(1, "Missing required TXQ for adding bcast STA\n"))
+		} else {
+			WARN(1, "Missing required TXQ for adding bcast STA\n");
 			return -EINVAL;
+		}
 
 		bsta->tfd_queue_msk |= BIT(queue);