slippy: Add EC to the device tree

This lets the keyboard init get called properly.

BUG=chrome-os-partner:19035
BRANCH=none
TEST=emerge-slippy chromeos-coreboot-slippy

Change-Id: I11ffb459907188a58149d28a6ade0b7de7d15d08
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/50853
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/mainboard/google/slippy/devicetree.cb

@@ -84,7 +84,15 @@ chip northbridge/intel/haswell
 			device pci 1c.5 off end # PCIe Port #6
 			device pci 1d.0 on end # USB2 EHCI
 			device pci 1e.0 off end # PCI bridge
-			device pci 1f.0 on end # LPC bridge
+			device pci 1f.0 on
+				chip ec/google/chromeec
+					# We only have one init function that
+					# we need to call to initialize the
+					# keyboard part of the EC.
+					device pnp ff.1 on # dummy address
+					end
+				end
+			end # LPC bridge
 			device pci 1f.2 on end # SATA Controller
 			device pci 1f.3 on end # SMBus
 			device pci 1f.6 on end # Thermal