mainboard/google/soraka: Remove wacom digitizer

We have no wacom digitizer on I2C#3, so remove it.

TEST=build and boot on soraka.

Change-Id: I3f5a1b9ece6fc9a9443477c7a7aa77dbcdf6a703
Signed-off-by: Wisley Chen <wisley.chen@quantatw.com>
Reviewed-on: https://review.coreboot.org/21309
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/google/poppy/variants/soraka/devicetree.cb b/src/mainboard/google/poppy/variants/soraka/devicetree.cb
index b39092b..3ac3aaf 100644
--- a/src/mainboard/google/poppy/variants/soraka/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/soraka/devicetree.cb
@@ -204,9 +204,6 @@
 		},
 	}"
 
-	# Pen
-	register "i2c_voltage[3]" = "I2C_VOLTAGE_1V8"
-
 	# Camera
 	register "i2c_voltage[4]" = "I2C_VOLTAGE_1V8"
 	register "i2c[4]" = "{
@@ -243,7 +240,7 @@
 		[PchSerialIoIndexI2C0]  = PchSerialIoPci,
 		[PchSerialIoIndexI2C1]  = PchSerialIoPci,
 		[PchSerialIoIndexI2C2]  = PchSerialIoPci,
-		[PchSerialIoIndexI2C3]  = PchSerialIoPci,
+		[PchSerialIoIndexI2C3]  = PchSerialIoDisabled,
 		[PchSerialIoIndexI2C4]  = PchSerialIoPci,
 		[PchSerialIoIndexI2C5]  = PchSerialIoPci,
 		[PchSerialIoIndexSpi0]  = PchSerialIoPci,
@@ -298,15 +295,7 @@
 			end
 		end # I2C #1
 		device pci 15.2 on end # I2C #2
-		device pci 15.3 on
-			chip drivers/i2c/hid
-				register "generic.hid" = ""WCOM50C1""
-				register "generic.desc" = ""WCOM Digitizer""
-				register "generic.irq" = "ACPI_IRQ_LEVEL_LOW(GPP_D1_IRQ)"
-				register "hid_desc_reg_offset" = "0x1"
-				device i2c 0x9 on end
-			end
-		end # I2C #3
+		device pci 15.3 off end # I2C #3
 		device pci 16.0 on  end # Management Engine Interface 1
 		device pci 16.1 off end # Management Engine Interface 2
 		device pci 16.2 off end # Management Engine IDE-R