rtc: sd2405al: Add I2C address.

It is common to include the I2C address of the device in the source
file.

Signed-off-by: Tóth János <gomba007@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Author: g0mb4

drivers/rtc/rtc-sd2405al.c

@@ -5,7 +5,9 @@
  * Datasheet:
  * https://image.dfrobot.com/image/data/TOY0021/SD2405AL%20datasheet%20(Angelo%20v0.1).pdf
  *
- * Copyright (C) 2024 Tóth János <gomba007@gmail.com>
+ * I2C slave address: 0x32
+ *
+ * Copyright (C) 2024-2025 Tóth János <gomba007@gmail.com>
  */
 
 #include <linux/bcd.h>