platforms/boards/silabs/stk3200.repl

using "platforms/cpus/silabs/efm32xg/efm32zg222.repl"

led0: Miscellaneous.LED @ gpioPort 66
led1: Miscellaneous.LED @ gpioPort 67

button0: Miscellaneous.Button @ gpioPort 64
button1: Miscellaneous.Button @ gpioPort 65