fcc-unlock: add support for new Lenovo T99W175 SDX55 FCC unlock method
Tested w/ Lenovo firmware T99W175.F0.1.0.0.9.DT.003.055 (old unlock method) and T99W175.F0.1.0.0.9.DT.003.079 (new unlock method)
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Tested w/ Lenovo firmware T99W175.F0.1.0.0.9.DT.003.055 (old unlock method) and T99W175.F0.1.0.0.9.DT.003.079 (new unlock method)