sh: add CONFIG_VIRTUALIZATION for virtio support

Add CONFIG_VIRTUALIZATION to the SH architecture
and include the virtio code there. Used to enable
the virtio drivers under QEMU.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index c497307..c2325bd 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -871,4 +871,20 @@
 
 source "crypto/Kconfig"
 
+menuconfig VIRTUALIZATION
+	bool "Virtualization"
+	default n
+	---help---
+	  Say Y here to get to see options for using your Linux host to run other
+	  operating systems inside virtual machines (guests).
+	  This option alone does not add any kernel code.
+
+	  If you say N, all options in this submenu will be skipped and disabled.
+
+if VIRTUALIZATION
+
+source drivers/virtio/Kconfig
+
+endif # VIRTUALIZATION
+
 source "lib/Kconfig"