pwm: lpc18xx-sct: remove unneeded semicolon

Eliminate the following coccicheck warning:
./drivers/pwm/pwm-lpc18xx-sct.c:292:2-3: Unneeded semicolon
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

drivers/pwm/pwm-lpc18xx-sct.c

@@ -289,7 +289,7 @@ static int lpc18xx_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)
 		dev_err(lpc18xx_pwm->dev,
 			"maximum number of simultaneous channels reached\n");
 		return -EBUSY;
-	};
+	}
 
 	set_bit(event, &lpc18xx_pwm->event_map);
 	lpc18xx_data->duty_event = event;