mb/google/fizz: Make use of chipset devicetree

Use the references from the chipset devicetree as this makes the
comments superfluous and remove devices which are turned off.

Built all variants with BUILD_TIMELESS=1 and the resulting binaries
remain the same.

Change-Id: I7752819091e2a75c8d818f7d0cf90eabc11c4759
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Signed-off-by: Marvin Evers <marvin.evers@stud.hs-bochum.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79327
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
diff --git a/src/mainboard/google/fizz/variants/karma/overridetree.cb b/src/mainboard/google/fizz/variants/karma/overridetree.cb
index 1dba50c..d1dc46f 100644
--- a/src/mainboard/google/fizz/variants/karma/overridetree.cb
+++ b/src/mainboard/google/fizz/variants/karma/overridetree.cb
@@ -22,7 +22,7 @@
 	}"
 
 	device domain 0 on
-		device pci 14.0 on
+		device ref south_xhci on
 			chip drivers/usb/acpi
 				device usb 0.0 on
 					chip drivers/usb/acpi
@@ -57,8 +57,8 @@
 					end
 				end
 			end
-		end # USB xHCI
-		device pci 19.1 on
+		end
+		device ref i2c5 on
 			chip drivers/generic/max98357a
 				register "hid" = ""MX98357A""
 				register "sdmode_gpio" =  "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_A23)"
@@ -82,7 +82,7 @@
 				register "mic_amp_in_sel" = ""diff""
 				device i2c 1a on end
 			end
-		end # I2C #5
-		device pci 1e.6 off end # SDCard
+		end
+		device ref sdxc off end
 	end
 end