net: korina: fix kfree of rx/tx descriptor array

kmalloc returns KSEG0 addresses so convert back from KSEG1
in kfree. Also make sure array is freed when the driver is
unloaded from the kernel.

Fixes: ef11291b ("Add support the Korina (IDT RC32434) Ethernet MAC")
Signed-off-by: Valentin Vidic <vvidic@valentin-vidic.from.hr>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/korina.c

@@ -1113,7 +1113,7 @@ static int korina_probe(struct platform_device *pdev)
 	return rc;
 
 probe_err_register:
-	kfree(lp->td_ring);
+	kfree(KSEG0ADDR(lp->td_ring));
 probe_err_td_ring:
 	iounmap(lp->tx_dma_regs);
 probe_err_dma_tx:
@@ -1133,6 +1133,7 @@ static int korina_remove(struct platform_device *pdev)
 	iounmap(lp->eth_regs);
 	iounmap(lp->rx_dma_regs);
 	iounmap(lp->tx_dma_regs);
+	kfree(KSEG0ADDR(lp->td_ring));
 
 	unregister_netdev(bif->dev);
 	free_netdev(bif->dev);