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There's a proper kernel way to check for the presence of P- and E-cores so we don't have to check the frequency differences.
Kept the frequency check in case the kernel way does not exist on the users kernel but upped the fail-safe to 10% from 5% to close#498
Added detection for big.LITTLE aka cpu:s where not all cores have the same frequency like on Intel Alder Lake and newer. The current logic allows a 5% difference in the max frequency due to some reports that those cpu:s doesn't always give back the exact same value (possible due to boosting capability).
