ec/lenovo/h8: Disable POST codes

The EC doesn't care about POST codes send to port 80h and there's
no POST code display on the laptops, thus disable POST codes at all.

TEST=Lenovo X220 still boots.

Change-Id: Idf666796d3cbb504c6e68d84521359d7e2fe98d0
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/88999
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/ec/lenovo/h8/Kconfig

@@ -6,6 +6,9 @@ config EC_LENOVO_H8
 
 if EC_LENOVO_H8
 
+config NO_POST
+	default y
+
 config SEABIOS_PS2_TIMEOUT
 	int
 	depends on PAYLOAD_SEABIOS