sandybridge: provide monotonic timer function

This fixes building the ELOG_GSMI feature by using the TSC as time source for
the flash drivers.

It's not the most precise clock, but should be good enough for the purpose.

Change-Id: I2d416c34268236228300a9e868628c35e22bf40c
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: http://review.coreboot.org/10813
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
1 file changed