iot-lab_M3: fixing term make target

boards/iot-lab_M3/Makefile.include

@@ -13,7 +13,7 @@ export AS = $(PREFIX)as
 export LINK = $(PREFIX)gcc
 export SIZE = $(PREFIX)size
 export OBJCOPY = $(PREFIX)objcopy
-export TERMPROG = $(RIOTBASE)/dist/tools/pyterm/pyterm -p
+export TERMPROG = $(RIOTBASE)/dist/tools/pyterm/pyterm
 export FLASHER = $(RIOTBOARD)/$(BOARD)/dist/flash.sh
 export DEBUGGER = $(RIOTBOARD)/$(BOARD)/dist/debug.sh
 export RESET = $(RIOTBOARD)/$(BOARD)/dist/reset.sh
@@ -30,6 +30,7 @@ export LINKFLAGS += -T$(LINKERSCRIPT)
 export OFLAGS = -O ihex
 export FFLAGS = $(HEXFILE)
 export DEBUGGER_FLAGS = $(RIOTBOARD)/$(BOARD)/dist/gdb.conf $(ELFFILE)
+export TERMFLAGS = -p $(PORT)
 
 # use the nano-specs of the NewLib when available
 ifeq ($(shell $(LINK) -specs=nano.specs -E - 2>/dev/null >/dev/null </dev/null ; echo $$?),0)