mb/supermicro/x11ssh-tf: Disable i8042 support

Even though the vendor firmware enables the i8042 I/O port, it doesn't
feed valid data to those, but instead uses USB HID devices.

Disable the KBC port in SuperI/O and report no KCS port using FADT.

Fixes:
* Fixes error message in Linux that i8042 keyboard couldn't be enabled.

Tested on Supermicro X11SSH-TF:
The virtual remote managment console still works.

Change-Id: I1cdf648aa5bf1d0ec48520fa1e45bdaf043cb45d
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36078
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Nico Huber <nico.h@gmx.de>
diff --git a/src/mainboard/supermicro/x11-lga1151-series/variants/x11ssh-tf/overridetree.cb b/src/mainboard/supermicro/x11-lga1151-series/variants/x11ssh-tf/overridetree.cb
index 3e587dc..aace4f7 100644
--- a/src/mainboard/supermicro/x11-lga1151-series/variants/x11ssh-tf/overridetree.cb
+++ b/src/mainboard/supermicro/x11-lga1151-series/variants/x11ssh-tf/overridetree.cb
@@ -114,12 +114,7 @@
 							io 0x66 = 0xa30
 							irq 0x70 = 0xb
 						end
-						device pnp 2e.5 on	# Keyboard
-							io 0x60 = 0x60
-							io 0x62 = 0x64
-							irq 0x70 = 1
-							irq 0x72 = 0xc
-						end
+						device pnp 2e.5 off end	# KBC
 						device pnp 2e.7 on end	# GPIO
 						device pnp 2e.b on	# SUART3
 							io 0x60 = 0x3e8