vhost-net: add module alias (v2.1)

By adding some module aliases, programs (or users) won't have to explicitly
call modprobe. Vhost-net will always be available if built into the kernel.
It does require assigning a permanent minor number for depmod to work.

Also:
  - use C99 style initialization.
  - add missing entry in documentation for loop-control

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-By: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devices.txt

@@ -447,6 +447,9 @@ Your cooperation is appreciated.
 		234 = /dev/btrfs-control	Btrfs control device
 		235 = /dev/autofs	Autofs control device
 		236 = /dev/mapper/control	Device-Mapper control device
+		237 = /dev/loop-control Loopback control device
+		238 = /dev/vhost-net	Host kernel accelerator for virtio net
+
 		240-254			Reserved for local use
 		255			Reserved for MISC_DYNAMIC_MINOR