net: ti: icssg-prueth: Add AM64x icssg support

Add AM64x ICSSG support which is similar to am65x SR2.0, but required:
- all ring configured in exposed ring mode
- always fill both original and buffer fields in cppi5 desc
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/ethernet/ti/icssg/icssg_prueth.c

@@ -2313,8 +2313,13 @@ static const struct prueth_pdata am654_icssg_pdata = {
 	.quirk_10m_link_issue = 1,
 };
 
+static const struct prueth_pdata am64x_icssg_pdata = {
+	.fdqring_mode = K3_RINGACC_RING_MODE_RING,
+};
+
 static const struct of_device_id prueth_dt_match[] = {
 	{ .compatible = "ti,am654-icssg-prueth", .data = &am654_icssg_pdata },
+	{ .compatible = "ti,am642-icssg-prueth", .data = &am64x_icssg_pdata },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, prueth_dt_match);