Port C doesn't exist on the SAM4s, so removed reference to it.
Port C doesn't exist on the SAM4s, so removed reference to it.

logos-electromechanical/ExperimentalCore-sam,AloyseTech/ExperimentalCore-sam,logos-electromechanical/ExperimentalCore-sam,aethaniel/ExperimentalCore-sam,aethaniel/ExperimentalCore-sam,logos-electromechanical/ExperimentalCore-sam,AloyseTech/ExperimentalCore-sam