Use new CMSIS and CMSIS-Atmel packages

[sandeepmistry]

Do not merge yet, still needs some testing ...

cc/ @cmaglie @aethaniel

[ArduinoBot]

✅ Build completed.

⬇️ Build URL: http://downloads.arduino.cc/PR/samd/package_samd-b117_index.json

ℹ️ To test this build:

1. Open the Preferences of the Arduino IDE.
2. Add the Build URL above in the Additional Boards Manager URLs field, and click OK.
3. Open the Boards Manager (menu Tools->Board->Board Manager...)
4. Install Arduino SAMD core - Pull Request Use new CMSIS and CMSIS-Atmel packages #183
5. Select one of the boards under SAMD Pull Request Use new CMSIS and CMSIS-Atmel packages #183 in Tools->Board menu
6. Compile/Upload as usual

[sandeepmistry]

Tested with staging, things look good.

I'll get @agdl to again next week too.

[agdl]

It works! I'm merging it!

[sandeepmistry]

This requires the new CMSIS packages:

• https://github.com/arduino/ArduinoModule-CMSIS
• https://github.com/arduino/ArduinoModule-CMSIS-Atmel