northbridge/intel/sandybridge/pei_data.h: Fix typo in hig*h*est in comment

Change-Id: I0daf5d1d446de1f09b695f177b0491301613e278
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: http://review.coreboot.org/5667
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
1 file changed