examples/lora/lorawan: add missing functions for simulated interface

Signed-off-by: deadprogram <ron@hybridgroup.com>

Author: deadprogram

examples/lora/lorawan/common/sim.go

@@ -29,6 +29,11 @@ func (sr *SimLoraRadio) SetCodingRate(cr uint8)      {}
 func (sr *SimLoraRadio) SetBandwidth(bw uint8)       {}
 func (sr *SimLoraRadio) SetCrc(enable bool)          {}
 func (sr *SimLoraRadio) SetSpreadingFactor(sf uint8) {}
+func (sr *SimLoraRadio) SetHeaderType(headerType uint8) {}
+func (sr *SimLoraRadio) SetPreambleLength(pLen uint16) {}
+func (sr *SimLoraRadio) SetPublicNetwork(enabled bool) {}
+func (sr *SimLoraRadio) SetSyncWord(syncWord uint16) {}
+func (sr *SimLoraRadio) SetTxPower(txPower int8)       {}
 func (sr *SimLoraRadio) LoraConfig(cnf lora.Config)  {}
 
 func FirmwareVersion() string {