* Add efr32-freertos.mk to build libfreertos

* Add SystemEventSupport and SystemTimerSupport

* Add globals

* Update helper Makefiles

* Update .gitignore

* Update DeviceLayer library and fix logging support

* Remove "with-openssl=no" from efr32-chip.mk

* Remove functionality from InitChipStack

* Fix RTT Logs by using a more recent version

* Remove commented out code and leave TODOs instead

* Remove commented code