mb/google,samsung/*: Add LPC TPM chip driver to devicetree

With commits 9987534 [southbridge/intel: Remove leftover TPM ACPI code]
and 66ce18c [soc/intel: Remove legacy static TPM asl code] removing
TPM ASL code from the southbridge's LPCB device, the LPC TPM chip driver
(drivers/pc80/tpm) must be added to devicetree in order to ensure the
new acpigen code is used to replace it.

Test: boot various google/samsung boards, verify SSDT created with 
LPBC.TPM device and TPM visible to and usable by SeaBIOS and Linux

Change-Id: Iedaa01f26fb357914549bb3dda24b0bd6ef67480
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/27786
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/google/butterfly/devicetree.cb b/src/mainboard/google/butterfly/devicetree.cb
index 9b44fe8..692414c 100644
--- a/src/mainboard/google/butterfly/devicetree.cb
+++ b/src/mainboard/google/butterfly/devicetree.cb
@@ -87,6 +87,9 @@
 			device pci 1d.0 on end # USB2 EHCI #1
 			device pci 1e.0 off end # PCI bridge
 			device pci 1f.0 on #LPC bridge
+				chip drivers/pc80/tpm
+					device pnp 0c31.0 on end
+				end
 				chip ec/quanta/ene_kb3940q
 					# 60/64 KBC
 					device pnp ff.1 on # dummy address