PIN and GPIO have caused constant confusion amongst customers with their overlap. We need to finally merge them into something that covers the most important parts of both usecases.

This includes:

• Updating the GPIO API to support default values for IO's not explicitly configured by a driver
• Adding a native GPIO driver implementation for CC13XX and CC26XX devices
• Updating all CC13XX and CC26XX drivers to use GPIO instead of PIN
• SysConfig updates to support all of the above