cw1200: use true,false for bool variable

Fixes coccicheck warning:

drivers/net/wireless/st/cw1200/txrx.c:718:6-16: WARNING: Assignment of 0/1 to bool variable
Reported-by: NHulk Robot <hulkci@huawei.com>
Signed-off-by: Nzhengbin <zhengbin13@huawei.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/st/cw1200/txrx.c

@@ -715,7 +715,7 @@ void cw1200_tx(struct ieee80211_hw *dev,
 	};
 	struct ieee80211_sta *sta;
 	struct wsm_tx *wsm;
-	bool tid_update = 0;
+	bool tid_update = false;
 	u8 flags = 0;
 	int ret;