w1: ds2408: drop kerneldoc annotation

Drop kerneldoc annotation from comment which is not a kerneldoc to fix:

  w1_ds2408.c:210: warning: This comment starts with '/**', but isn't a kernel-doc comment
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230415104304.104134-1-krzysztof.kozlowski@linaro.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/w1/slaves/w1_ds2408.c

@@ -206,7 +206,7 @@ static ssize_t output_write(struct file *filp, struct kobject *kobj,
 }
 
 
-/**
+/*
  * Writing to the activity file resets the activity latches.
  */
 static ssize_t activity_write(struct file *filp, struct kobject *kobj,