Platform drivers for Mbed.

Dependents:   EVAL-CN0535-FMCZ EVAL-CN0535-FMCZ EVAL-AD568x-AD569x EVAL-AD7606 ... more

This pull request has been rejected by Analog Devices

Updates for platform driver

- Include the following libraries: ○ crc ○ crc8 ○ uart ○ util - Add microsecond delay - Move baud rate definition to mbed_app.json file - Add bit shift for I2C slave address - Check error for redefinition - Make gpio handling more robust

Update platform drivers