rtc: pcf2127: Fix typo in comment

Replace TFS2 with TSF2.

Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20211207215626.2619819-1-hugo@hugovil.com

Author: hvilleneuvedoo

drivers/rtc/rtc-pcf2127.c

@@ -748,7 +748,7 @@ static int pcf2127_probe(struct device *dev, struct regmap *regmap,
 
 	/*
 	 * Enable timestamp function and store timestamp of first trigger
-	 * event until TSF1 and TFS2 interrupt flags are cleared.
+	 * event until TSF1 and TSF2 interrupt flags are cleared.
 	 */
 	ret = regmap_update_bits(pcf2127->regmap, PCF2127_REG_TS_CTRL,
 				 PCF2127_BIT_TS_CTRL_TSOFF |