It seems to me that Intel ought to release the daemon under the GPL, using the provision that a modified version may be required to report that it is modified, and have the kernel driver check that the daemon isn't modified. Of course, since the kernel driver is also open source, it could be modified to expect the modified version of the daemon, but someone would have to be intentionally messing with stuff at that point (and they could just make the driver not worry about regulatory stuff).
Alternatively, it could be GPL, but have a "distribute but don't modify" file with the actual rules (and check its hash to make sure it hasn't been modified accidentally). That shouldn't be an issue, since all GPL packages include at least one file that people aren't allowed to change...
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