Staging: hv: storvsc: Cleanup returned error code in storvsc_drv_init()

Use standard Linux error codes.
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/storvsc_drv.c

@@ -740,7 +740,7 @@ static int __init storvsc_drv_init(void)
 
 	if (max_outstanding_req_per_channel <
 	    STORVSC_MAX_IO_REQUESTS)
-		return -1;
+		return -EINVAL;
 
 	return vmbus_driver_register(&storvsc_drv);
 }