SPI Clock Frequency fix, added handling GPIOs
Fixed maximum SPI clock frequency to 80 % of master clock frequency.
ACAN2517FDSettings::RequestedMode and ACAN2517FD::OperationMode types have been merged: now, use ACAN2517FDSettings::OperationMode. Consequently, the NormalFD, Sleep, InternalLoopBack, ListenOnly, Configuration, ExternalLoopBack, Normal20B and RestrictedOperation enumeration constants are available for ACAN2517FDSettings::OperationMode enumeration type.
Added the ACAN2517FD::setOperationMode method.
Added the ACAN2517FD::performSleepModeToConfigurationMode method.
Added handling of GPIO0, GPIO1 and XSTBY.