Switch from lapic to tsc. Allows timestamps to be used in coreboot, as there's a reference clock available to calculate correct time units. Clean Kconfig, remove duplicated lapic code and include tsc dir for LGA1155 boards. Tested on Lenovo T430. Change-Id: I849ca2b3908116d9d22907039cd6e4464444b1d1 Signed-off-by: Patrick Rudolph <siro@das-labor.org> Reviewed-on: https://review.coreboot.org/20044 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>