ionic: Fix an error code in ionic_lif_alloc()

We need to set the error code on this path.  Otherwise it probably
results in a NULL dereference down the line.

Fixes: aa319881 ("ionic: Add RSS support")
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Acked-by: NShannon Nelson <snelson@pensando.io>
Signed-off-by: NJakub Kicinski <jakub.kicinski@netronome.com>

drivers/net/ethernet/pensando/ionic/ionic_lif.c

@@ -1704,6 +1704,7 @@ static struct ionic_lif *ionic_lif_alloc(struct ionic *ionic, unsigned int index
 					      GFP_KERNEL);
 
 	if (!lif->rss_ind_tbl) {
+		err = -ENOMEM;
 		dev_err(dev, "Failed to allocate rss indirection table, aborting\n");
 		goto err_out_free_qcqs;
 	}