Bottom five LSBs are used to store the running frequency of memory clock. Change-Id: I2dfcf1950883836499ea2ca95f9eb72ccdfb979c Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/19042 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Martin Roth <martinroth@google.com>