Staging: hv: netvsc: Cleanup the returned error code in netvsc_probe()

Use standard Linux error codes.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/hv/netvsc_drv.c b/drivers/staging/hv/netvsc_drv.c
index 0b8ac1a..90a3198 100644
--- a/drivers/staging/hv/netvsc_drv.c
+++ b/drivers/staging/hv/netvsc_drv.c
@@ -338,7 +338,7 @@
 
 	net = alloc_etherdev(sizeof(struct net_device_context));
 	if (!net)
-		return -1;
+		return -ENOMEM;
 
 	/* Set initial state */
 	netif_carrier_off(net);