kunimitsu: Clean up mainboard code to match glados

Clean up the intel/kunimitsu mainboard code to match the code
and cleanups in glados.  Many of these are trivial changes that
do not impact things in a meaningful way but will make it easier
to diff the code and keep the mainboards in sync.

- use relative path for mainboard includes to make porting easier
- fix trivial style issues to match glados so diffs are clean
- pull GPIO configuration into gpio.h and use from there
- remove thermal.h as it is not used on this board
- make info message BIOS_INFO instead of BIOS_ERR
- add support for SPD manufacturer and part number in SMBIOS

BUG=chrome-os-partner:40635
BRANCH=none
TEST=emerge-kunimitsu coreboot

Change-Id: I64a053bcec0e0ff25a57f65659f391ab64d9a11a
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: e47f0fd3e00a665f07098c7ea0018d51b105d1be
Original-Change-Id: Ib787f3ccc63115de48c4d608ca2bd81b58d24b6c
Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/297752
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/11576
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/mainboard/intel/kunimitsu/chromeos.c

@@ -22,11 +22,13 @@
 #include <console/console.h>
 #include <device/device.h>
 #include <device/pci.h>
-#include <ec/google/chromeec/ec.h>
+#include <rules.h>
 #include <gpio.h>
 #include <soc/gpio.h>
 #include <string.h>
+#include <ec/google/chromeec/ec.h>
 #include <vendorcode/google/chromeos/chromeos.h>
+
 #include "gpio.h"
 #include "ec.h"