Add Kconfig flag to specify if there's a lid switch

Add Kconfig flag to specify if there's a lid switch

Not all devices have a lid switch, so we need to state this
somehow. Since the alternative would be to extend get_lid_switch()'s
semantics to become a tri-state (open, closed, N/A), do this
through Kconfig.

BRANCH=none
BUG=chromium:446945
TEST=none

Change-Id: Icc50f72535f256051a59925a178fb27b2e8f7e55
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: d20a1d1a22d64546a5d8761b18ab29732ec0b848
Original-Change-Id: Ie8ac401fbaad5b5a9f1dec2b67847c81f4cc94aa
Original-Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/273850
Original-Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
Original-Tested-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Queue: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: http://review.coreboot.org/10692
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>