xen/netfront: select XEN_XENBUS_FRONTEND

Make sure the Xen frontend xenbus is enabled.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
[corresponds to c40912891c3b in git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 4f1755b..cbf0635 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -2960,6 +2960,7 @@
 config XEN_NETDEV_FRONTEND
 	tristate "Xen network device frontend driver"
 	depends on XEN
+	select XEN_XENBUS_FRONTEND
 	default y
 	help
 	  The network device frontend driver allows the kernel to