Staging: hv: netvsc: Cleanup alloc_net_device()

Cleanup alloc_net_device(); we can directly set the refcnt.
Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/hv/netvsc.c

@@ -41,7 +41,7 @@ static struct netvsc_device *alloc_net_device(struct hv_device *device)
 		return NULL;
 
 	/* Set to 2 to allow both inbound and outbound traffic */
-	atomic_cmpxchg(&net_device->refcnt, 0, 2);
+	atomic_set(&net_device->refcnt, 2);
 
 	net_device->dev = device;
 	device->ext = net_device;