rtc: add timestamp for end of 2199

Some RTCs handle date up to 2199.

Link: https://lore.kernel.org/r/20191016201626.31309-1-alexandre.belloni@bootlin.comSigned-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

include/linux/rtc.h

@@ -165,6 +165,7 @@ struct rtc_device {
 #define RTC_TIMESTAMP_BEGIN_2000	946684800LL /* 2000-01-01 00:00:00 */
 #define RTC_TIMESTAMP_END_2063		2966371199LL /* 2063-12-31 23:59:59 */
 #define RTC_TIMESTAMP_END_2099		4102444799LL /* 2099-12-31 23:59:59 */
+#define RTC_TIMESTAMP_END_2199		7258118399LL /* 2199-12-31 23:59:59 */
 #define RTC_TIMESTAMP_END_9999		253402300799LL /* 9999-12-31 23:59:59 */
 
 extern struct rtc_device *devm_rtc_device_register(struct device *dev,