rtc: Add Sun4V hypervisor RTC driver.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 5d600ff..23403fa 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -592,4 +592,11 @@
 	 the RTC. This exposes that functionality through the generic RTC
 	 class.
 
+config RTC_DRV_SUN4V
+	bool "SUN4V Hypervisor RTC"
+	depends on SPARC64
+	help
+	  If you say Y here you will get support for the Hypervisor
+	  based RTC on SUN4V systems.
+
 endif # RTC_CLASS