mb/google/zork: disable non-GPU HD Audio device

The zork devices use the ACP (audio co-processor) and the I2S interface
for audio and not the HDA (HD audio) device and interface.

BUG=b:158535201,b:162302028
BRANCH=zork
TEST=Equivalent change on Mandolin disabled the non-GPU HDA device with
the corresponding FSP change applied.

Change-Id: I6c7de881cff8398fe416151fab219142d4fc904a
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44681
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt Papageorge <matthewpapa07@gmail.com>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/mainboard/google/zork/variants/baseboard/devicetree_dalboz.cb

@@ -283,7 +283,7 @@ chip soc/amd/picasso
 					device generic 0.0 on end
 				end
 			end # Audio
-			device pci 0.6 on  end # HDA
+			device pci 0.6 off end # HDA
 			device pci 0.7 on  end # non-Sensor Fusion Hub device
 		end
 		device pci 8.2 on      # Internal GPP Bridge 0 to Bus B

src/mainboard/google/zork/variants/baseboard/devicetree_trembyle.cb

@@ -312,7 +312,7 @@ chip soc/amd/picasso
 					device generic 0.0 on end
 				end
 			end # Audio
-			device pci 0.6 on  end # HDA
+			device pci 0.6 off end # HDA
 			device pci 0.7 on  end # non-Sensor Fusion Hub device
 		end
 		device pci 8.2 on      # Internal GPP Bridge 0 to Bus B