mainboard/intel/leafhill: Clean up

This patch tries to clean the code by:
o removing duplication of LPC GPIO pads
o removing incorrect definitions from devicetree
o removing irrelevant entries from FMD file

Also adds vital defaults in Kconfig so it is possible to build an image.

Change-Id: Id9913f3b053189166392271152ce5300d82a7de8
Signed-off-by: Andrey Petrov <andrey.petrov@intel.com>
Reviewed-on: https://review.coreboot.org/18479
Tested-by: build bot (Jenkins)
7 files changed