mainboard/google/kahlee: Set SYSTEM_TYPE_LAPTOP

This configures the ACPI FADT perferred power management profile to
PM_MOBILE instead of PM_DESKTOP.

I'm not sure what impact this actually has. I just noticed the other
boards have it set.

BUG=b:110971913
TEST=Made sure SYSTEM_TYPE_LAPTOP shows up in coreboot.config

Change-Id: Iea1b8359b80d167e69745358f543f025713294ba
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Reviewed-on: https://review.coreboot.org/27930
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

src/mainboard/google/kahlee/Kconfig

@@ -43,6 +43,7 @@ config BOARD_GOOGLE_BASEBOARD_KAHLEE
 	select PCIEXP_COMMON_CLOCK
 	select PCIEXP_L1_SUB_STATE
 	select HAVE_EM100_SUPPORT
+	select SYSTEM_TYPE_LAPTOP
 
 if BOARD_GOOGLE_BASEBOARD_KAHLEE