gve: Fix error return code in gve_alloc_qpls()

Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: f5cedc84 ("gve: Add transmit and receive support")
Signed-off-by: NWei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/google/gve/gve_main.c

@@ -625,8 +625,10 @@ static int gve_alloc_qpls(struct gve_priv *priv)
 				     sizeof(unsigned long) * BITS_PER_BYTE;
 	priv->qpl_cfg.qpl_id_map = kvzalloc(BITS_TO_LONGS(num_qpls) *
 					    sizeof(unsigned long), GFP_KERNEL);
-	if (!priv->qpl_cfg.qpl_id_map)
+	if (!priv->qpl_cfg.qpl_id_map) {
+		err = -ENOMEM;
 		goto free_qpls;
+	}
 
 	return 0;