Documentation/nb/intel/sandybridge/nri_registers.md: Fix mistake

According to a comment on fa1a07b, the 100MHz clock is the Ivy Bridge
only clock, not the 133MHz one.

Change-Id: I28fed4a9264b96f93b9e88325f547a5db512514c
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/28377
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
1 file changed