nb/intel/x4x: Fix underclocking of 800MHz DDR2 RAM

Previously, any 800MHz DIMMs were being slowed to 667MHz
for no reason other than there was a bug in the maximum
frequency detection code for the MCH.

Change-Id: Id6c6c88c4a40631f6caf52f536a939a43cb3faf1
Signed-off-by: Damien Zammit <damien@zamaudio.com>
Reviewed-on: https://review.coreboot.org/15257
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
1 file changed