mb/google/brya/var/kano: Add Synaptics touchpad

Add Synaptics touchpad for kano.

BUG=None
TEST=emerge-brya coreboot and check touchpad function work.

Signed-off-by: David Wu <david_wu@quanta.corp-partner.google.com>
Change-Id: Iec43aaa9525309d2a0e3c9822038869786f5fe66
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58030
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
diff --git a/src/mainboard/google/brya/variants/kano/overridetree.cb b/src/mainboard/google/brya/variants/kano/overridetree.cb
index f8ac9ac..8802ab2 100644
--- a/src/mainboard/google/brya/variants/kano/overridetree.cb
+++ b/src/mainboard/google/brya/variants/kano/overridetree.cb
@@ -373,6 +373,15 @@
 				register "probed" = "1"
 				device i2c 15 on end
 			end
+			chip drivers/i2c/hid
+				register "generic.hid" = ""PNP0C50""
+				register "generic.desc" = ""Synaptics Touchpad""
+				register "generic.irq" = "ACPI_IRQ_WAKE_LEVEL_LOW(GPP_F14_IRQ)"
+				register "generic.wake" = "GPE0_DW2_14"
+				register "generic.probed" = "1"
+				register "hid_desc_reg_offset" = "0x20"
+				device i2c 0x2c on end
+			end
 		end
 		device ref gspi1 on
 			chip drivers/spi/acpi