[SerialICE] rdmsr

[Nils]

Hi,
I am trying to port SerialICE to my Geode GX2 board and wanted to use rdmsr / 
wrmsr for serial init but they seem a little different to the Coreboot 
versions.
Am i right that the extra "key" value always has to be: 9c5a203a and acts as a 
extra safety measure ?

Thanks , Nils.