rsi: Remove unnecessary boolean condition

Clang warns that the address of a pointer will always evaluated as true
in a boolean context.

drivers/net/wireless/rsi/rsi_91x_mac80211.c:927:50: warning: address of
array 'key->key' will always evaluate to 'true'
[-Wpointer-bool-conversion]
        if (vif->type == NL80211_IFTYPE_STATION && key->key &&
                                                ~~ ~~~~~^~~
1 warning generated.

Link: https://github.com/ClangBuiltLinux/linux/issues/136Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/rsi/rsi_91x_mac80211.c

@@ -924,7 +924,7 @@ static int rsi_hal_key_config(struct ieee80211_hw *hw,
 	if (status)
 		return status;
 
-	if (vif->type == NL80211_IFTYPE_STATION && key->key &&
+	if (vif->type == NL80211_IFTYPE_STATION &&
 	    (key->cipher == WLAN_CIPHER_SUITE_WEP104 ||
 	     key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
 		if (!rsi_send_block_unblock_frame(adapter->priv, false))