* Add an example app for the efr32

* Fix clang format for some source files

* Remove unused header file

* Remove commented code

* Remove more commented out code

* Remove unnecessary LED init in main

* Address review comment

* Make sure all available LEDs are flashed during a reset

* EFR32 does not support more than 2 LEDs

* Fix formatting in FreeRTOSConfig.h

* Add a new line at the end of env.sh

* Fix double space in Readme

* Fix hyperlink

* Remove env.sh and migrate it into the Makefile

* Remove unnecessary variable checks in the Makefile

* Cleanup context after requesting a software update

* Cleanup Makefile and add a link to CHIP's root

* Add fatal error if timers fail