Input: wdt87xx_i2c - replace mdelay() with msleep() in wdt87xx_resume()

wdt87xx_resume() is never called in atomic context.  It calls mdelay() to
busily wait, which is not necessary.  mdelay() can be replaced with
msleep().

This is found by a static analysis tool named DCNS written by myself.
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/wdt87xx_i2c.c

@@ -1142,7 +1142,7 @@ static int __maybe_unused wdt87xx_resume(struct device *dev)
 	 * The chip may have been reset while system is resuming,
 	 * give it some time to settle.
 	 */
-	mdelay(100);
+	msleep(100);
 
 	error = wdt87xx_send_command(client, VND_CMD_START, 0);
 	if (error)