thunderbolt: Make usb4_switch_map_pcie_down() also return enabled ports

Just for symmetry with the usb4_switch_map_usb3_down() make this one
also return ports that are enabled.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>

drivers/thunderbolt/tb.c

@@ -520,7 +520,7 @@ static struct tb_port *tb_find_pcie_down(struct tb_switch *sw,
 	if (down) {
 		if (WARN_ON(!tb_port_is_pcie_down(down)))
 			goto out;
-		if (WARN_ON(tb_pci_port_is_enabled(down)))
+		if (tb_pci_port_is_enabled(down))
 			goto out;
 
 		return down;

drivers/thunderbolt/usb4.c

@@ -728,7 +728,7 @@ struct tb_port *usb4_switch_map_pcie_down(struct tb_switch *sw,
 		if (!tb_port_is_pcie_down(p))
 			continue;
 
-		if (pcie_idx == usb4_idx && !tb_pci_port_is_enabled(p))
+		if (pcie_idx == usb4_idx)
 			return p;
 
 		pcie_idx++;