net/macb: enable scatter-gather feature and set DMA burst length for sama5d4 gem

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/cadence/macb.c

@@ -2005,6 +2005,11 @@ static struct macb_config sama5d3_config = {
 	.dma_burst_length = 16,
 };
 
+static struct macb_config sama5d4_config = {
+	.caps = 0,
+	.dma_burst_length = 4,
+};
+
 static const struct of_device_id macb_dt_ids[] = {
 	{ .compatible = "cdns,at32ap7000-macb" },
 	{ .compatible = "cdns,at91sam9260-macb" },
@@ -2012,6 +2017,7 @@ static const struct of_device_id macb_dt_ids[] = {
 	{ .compatible = "cdns,pc302-gem", .data = &pc302gem_config },
 	{ .compatible = "cdns,gem", .data = &pc302gem_config },
 	{ .compatible = "atmel,sama5d3-gem", .data = &sama5d3_config },
+	{ .compatible = "atmel,sama5d4-gem", .data = &sama5d4_config },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, macb_dt_ids);