[SPARC64]: Add SUN4V Hypervisor Console driver.

Since it can do things like BREAK and HUP, we implement
this as a serial uart driver.

This still needs interrupt probing code, as I haven't figured
out how interrupts will work or be probed for on SUN4V yet.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index b3c561a..89e5413 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -582,6 +582,13 @@
 	  on your Sparc system as the console, you can do so by answering
 	  Y to this option.
 
+config SERIAL_SUNHV
+	bool "Sun4v Hypervisor Console support"
+	depends on SPARC64
+	help
+	  This driver supports the console device found on SUN4V Sparc
+	  systems.  Say Y if you want to be able to use this device.
+
 config SERIAL_IP22_ZILOG
 	tristate "IP22 Zilog8530 serial support"
 	depends on SGI_IP22