mb/amd/mandolin: add SATA DXIO descriptor for Dali SKUs

Dali supports two SATA ports, but no PCIe alternate function on those
pins.

Change-Id: I27a13100e80565eb1dade2d703ba3d1f8b5f630f
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43493
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/mainboard/amd/mandolin/variants/mandolin/port_descriptors.c

@@ -146,6 +146,14 @@ static const fsp_pcie_descriptor dali_pcie_descriptors[] = {
 		.link_aspm_L1_2 = true,
 		.turn_off_unused_lanes = true,
 		.clk_req = CLK_REQ1
+	},
+	{ /* SATA */
+		.port_present = true,
+		.engine_type = SATA_ENGINE,
+		.start_lane = 2,
+		.end_lane = 3,
+		.gpio_group_id = 1,
+		.channel_type = SATA_CHANNEL_LONG,
 	}
 };