tile: add an RTC driver for the Tilera hypervisor

This is a simple RTC driver that lets Tilera hardware boot up and
set the clock correctly.

Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index e187887..d2c615f 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -995,4 +995,11 @@
 	  This drive can also be built as a module. If so, the module
 	  will be called rtc-tegra.
 
+config RTC_DRV_TILE
+	tristate "Tilera hypervisor RTC support"
+	depends on TILE
+	help
+	  Enable support for the Linux driver side of the Tilera
+	  hypervisor's real-time clock interface.
+
 endif # RTC_CLASS