mb/google/skyrim: Set system type to laptop

BUG=None
TEST=Verify that DMI type 3 - Chassis Information Type field has changed
from Desktop to Laptop

Signed-off-by: Martin Roth <gaumless@gmail.com>
Change-Id: I76c8970fe3fdc2ea322a07f114ad03a0373e152c
Reviewed-on: https://review.coreboot.org/c/coreboot/+/72907
Reviewed-by: Jon Murphy <jpmurphy@google.com>
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/mainboard/google/skyrim/Kconfig

@@ -41,6 +41,7 @@ config BOARD_SPECIFIC_OPTIONS
 	select SOC_AMD_MENDOCINO
 	select SOC_AMD_COMMON_BLOCK_I2C3_TPM_SHARED_WITH_PSP
 	select SOC_AMD_COMMON_BLOCK_USE_ESPI
+	select SYSTEM_TYPE_LAPTOP
 	select TPM_GOOGLE_TI50
 	select PCIEXP_ASPM
 	select PCIEXP_CLK_PM