2.2.0
- Improvements
  - Updated pit_config_t member naming.
  - Removed some APIs for prescaler and clock source selection.
2.1.0
- Improvements
  - Updated PIT clock source and PIT prescaler with more meaningful comments.
  - Updated PIT_SetTimerPeriod() and PIT_GetCurrentTimerCount() with 16-bit parameter.
  - Deleted mask parameter for PIT_ClearStatusFlags/PIT_EnableInterrupts/PIT_DisableInterrupts.
  - Added PIT_SetTimerClockSource() API to configure clock source.
  - Added PIT_EnableSlaveMode() API to configure slave mode.
2.0.1
- New Features
  - Added PIT_SetTimerPrescaler() API to configure clock prescaler value.
2.0.0
- Initial version.