mainboards using soc/amd/picasso: use aliases for PCIe devices on bus 0

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Ia6199c70163d32467abe5ba5da55c73ff62ba10f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55103
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
diff --git a/src/mainboard/amd/bilby/devicetree.cb b/src/mainboard/amd/bilby/devicetree.cb
index 7015185..10a5d2e 100644
--- a/src/mainboard/amd/bilby/devicetree.cb
+++ b/src/mainboard/amd/bilby/devicetree.cb
@@ -140,11 +140,11 @@
 
 	device domain 0 on
 		subsystemid 0x1022 0x1510 inherit
-		device pci 0.2 on  end # IOMMU
-		device pci 1.1 on  end # GPP Bridge 0
-		device pci 1.2 on  end # GPP Bridge 1
-		device pci 1.5 on  end # NVMe
-		device pci 8.1 on      # Bridge to Bus A
+		device ref iommu on end
+		device ref gpp_bridge_0 on end
+		device ref gpp_bridge_1 on end
+		device ref gpp_bridge_4 on end # NVMe
+		device ref internal_bridge_a on
 			device pci 0.0 on  end # Internal GPU
 			device pci 0.1 on  end # Display HDA
 			device pci 0.2 on  end # Crypto Coprocessor
@@ -154,12 +154,12 @@
 			device pci 0.6 on  end # HDA
 			device pci 0.7 on  end # non-Sensor Fusion Hub device
 		end
-		device pci 8.2 on      # Bridge to Bus B
+		device ref internal_bridge_b on
 			device pci 0.0 off end # AHCI
 			device pci 0.1 off end # integrated Ethernet MAC
 			device pci 0.2 off end # integrated Ethernet MAC
 		end
-		device pci 14.3 on      # D14F3 bridge
+		device ref lpc_bridge on
 			chip superio/smsc/sio1036 # optional debug card
 			end
 		end