rtc: Add Starfire platform RTC driver.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 23403fa..ecdff20 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -599,4 +599,11 @@
 	  If you say Y here you will get support for the Hypervisor
 	  based RTC on SUN4V systems.
 
+config RTC_DRV_STARFIRE
+	bool "Starfire RTC"
+	depends on SPARC64
+	help
+	  If you say Y here you will get support for the RTC found on
+	  Starfire systems.
+
 endif # RTC_CLASS