rtc: adding RX8010SJ rtc driver

Add a new driver for RX8010SJ rtc chip. The driver implements both
formats of U-Boot driver model.

Signed-off-by: Nandor Han <nandor.han@ge.com>
Signed-off-by: Martyn Welch <martyn.welch@collabora.co.uk>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 2964bb2..95ac031 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -30,6 +30,12 @@
 	  Support for Dallas Semiconductor (now Maxim) DS1307 and DS1338/9 and
 	  compatible Real Time Clock devices.
 
+config RTC_RX8010SJ
+	bool "Enable RX8010SJ driver"
+	depends on DM_RTC
+	help
+	  Support for Epson RX8010SJ Real Time Clock devices.
+
 config RTC_S35392A
 	bool "Enable S35392A driver"
 	select BITREVERSE