rtlwifi: rtl8723ae: fix comparison pointer to bool warning in trx.c

Fixes coccicheck warning:

drivers/net/wireless/realtek/rtlwifi/rtl8723ae/trx.c:592:5-9: WARNING: Comparison to bool
drivers/net/wireless/realtek/rtlwifi/rtl8723ae/trx.c:633:5-9: WARNING: Comparison to bool
Signed-off-by: Zheng Bin <zhengbin13@huawei.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200910141642.127006-3-zhengbin13@huawei.com

drivers/net/wireless/realtek/rtlwifi/rtl8723ae/trx.c

@@ -589,7 +589,7 @@ void rtl8723e_set_desc(struct ieee80211_hw *hw, u8 *pdesc8,
 {
 	__le32 *pdesc = (__le32 *)pdesc8;
 
-	if (istx == true) {
+	if (istx) {
 		switch (desc_name) {
 		case HW_DESC_OWN:
 			set_tx_desc_own(pdesc, 1);
@@ -630,7 +630,7 @@ u64 rtl8723e_get_desc(struct ieee80211_hw *hw,
 	u32 ret = 0;
 	__le32 *pdesc = (__le32 *)pdesc8;
 
-	if (istx == true) {
+	if (istx) {
 		switch (desc_name) {
 		case HW_DESC_OWN:
 			ret = get_tx_desc_own(pdesc);