cpu/x86/tsc: Compile TSC timer for postcar as well

Change-Id: I8fd79d438756aae03649e320d4d640cee284d88a
Signed-off-by: Andrey Petrov <andrey.petrov@intel.com>
Reviewed-on: https://review.coreboot.org/14298
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
1 file changed