rsi_91x: fix structurally dead code

Function rsi_hal_key_config returns before reaching code at line
922 if (status), hence this code is structurally dead.

Fix this by storing the value returned by rsi_hal_load_key
into _status_ for its further evaluation and use.

Addresses-Coverity-ID: 1468409 ("Structurally dead code")
Fixes: 4fd6c476 ("rsi: roaming enhancements")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/rsi/rsi_91x_mac80211.c

@@ -911,7 +911,7 @@ static int rsi_hal_key_config(struct ieee80211_hw *hw,
 		}
 	}
 
-	return rsi_hal_load_key(adapter->priv,
+	status = rsi_hal_load_key(adapter->priv,
 				  key->key,
 				  key->keylen,
 				  key_type,