pwm: mediatek: Remove unneeded semicolon

Remove unnecessary semicolons reported by Coccinelle/coccicheck and the
semantic patch at scripts/coccinelle/misc/semicolon.cocci.

This was introduced in commit 3a4a308 ("pwm: mediatek: Convert to
waveform API").

Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Link: https://patch.msgid.link/20251105214847.1279520-1-nichen@iscas.ac.cn
[ukleinek: Add reference to introducing commit.]
Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>

Author: Chen Ni

drivers/pwm/pwm-mediatek.c

@@ -266,7 +266,7 @@ static int pwm_mediatek_round_waveform_fromhw(struct pwm_chip *chip, struct pwm_
 				DIV_ROUND_UP_ULL(NSEC_PER_SEC, clk_rate),
 			.duty_length_ns = 0,
 		};
-	};
+	}
 
 	dev_dbg(&chip->dev, "pwm#%u: ENABLE: %x, CLKDIV: %x, PERIOD: %x, DUTY: %x @%lu -> %lld/%lld\n",
 		pwm->hwpwm, wfhw->enable, clkdiv, cnt_period, cnt_duty, clk_rate,