serial: sccnxp: Remove useless timer_pending() check

sccnxp_timer() is triggered only by timer, so there are no need to
check for timer_pending().
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/sccnxp.c

@@ -474,9 +474,7 @@ static void sccnxp_timer(unsigned long data)
 	sccnxp_handle_events(s);
 	spin_unlock_irqrestore(&s->lock, flags);
 
-	if (!timer_pending(&s->timer))
-		mod_timer(&s->timer, jiffies +
-			  usecs_to_jiffies(s->pdata.poll_time_us));
+	mod_timer(&s->timer, jiffies + usecs_to_jiffies(s->pdata.poll_time_us));
 }
 
 static irqreturn_t sccnxp_ist(int irq, void *dev_id)