thunderbolt: Include the additional DP IN double word in debugfs dump

When DisplayPort bandwidth allocation mode is supported by the DP IN
adapter it has an extra double word in the adapter config space. Include
this in the debugfs register dump.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>

drivers/thunderbolt/debugfs.c

@@ -1159,7 +1159,10 @@ static void port_cap_show(struct tb_port *port, struct seq_file *s,
 		if (tb_port_is_pcie_down(port) || tb_port_is_pcie_up(port)) {
 			length = PORT_CAP_PCIE_LEN;
 		} else if (tb_port_is_dpin(port) || tb_port_is_dpout(port)) {
-			length = PORT_CAP_DP_LEN;
+			if (usb4_dp_port_bw_mode_supported(port))
+				length = PORT_CAP_DP_LEN + 1;
+			else
+				length = PORT_CAP_DP_LEN;
 		} else if (tb_port_is_usb3_down(port) ||
 			   tb_port_is_usb3_up(port)) {
 			length = PORT_CAP_USB3_LEN;