There are hyper-threading Atom CPUs, those would not enable L2 cache with model_6ex CAR code. Switch to code that can handle different number of threads and cores. Change-Id: I57328c231f8998f45f7b0d26c63b24585f8476dd Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: http://review.coreboot.org/1384 Tested-by: build bot (Jenkins) Reviewed-by: Anton Kochkov <anton.kochkov@gmail.com> Reviewed-by: James Laird <jhl@mafipulation.org> Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>