soc/intel/jasperlake: Invoke PCIe root port swapping

Invoke PCIe root port devicetree update to swap the enabled root port
devices with the disabled devices.

BUG=b:162046161
TEST=Ensure that the PCIe device 1c.7 corresponding to Root port 8 is
swapped with the PCIe device 1c.0 corresponding to Root port 1.

Change-Id: I7d422014a2f5cafc41296ce0a2c116c82aefb0d7
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43835
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/jasperlake/chip.c

@@ -7,6 +7,7 @@
 #include <intelblocks/acpi.h>
 #include <intelblocks/cfg.h>
 #include <intelblocks/itss.h>
+#include <intelblocks/pcie_rp.h>
 #include <intelblocks/xdci.h>
 #include <romstage_handoff.h>
 #include <soc/intel/common/vbt.h>
@@ -15,6 +16,11 @@
 #include <soc/ramstage.h>
 #include <soc/soc_chip.h>
 
+static const struct pcie_rp_group pch_rp_groups[] = {
+	{ .slot = PCH_DEV_SLOT_PCIE,    .count = 8 },
+	{ 0 }
+};
+
 #if CONFIG(HAVE_ACPI_TABLES)
 const char *soc_acpi_name(const struct device *dev)
 {
@@ -132,6 +138,9 @@ void soc_init_pre_device(void *chip_info)
 	itss_restore_irq_polarities(GPIO_IRQ_START, GPIO_IRQ_END);
 
 	soc_fill_gpio_pm_configuration();
+
+	/* swap enabled PCI ports in device tree if needed */
+	pcie_rp_update_devicetree(pch_rp_groups);
 }
 
 static struct device_operations pci_domain_ops = {