boards/arduino-mkr1000: used shared BOSSA tooling

boards/arduino-mkr1000/Makefile.include

@@ -6,23 +6,19 @@ export CPU_MODEL = samd21g18a
 export PORT_LINUX ?= /dev/ttyACM0
 export PORT_DARWIN ?= $(firstword $(sort $(wildcard /dev/tty.usbmodem*)))
 
+# setup serial terminal
+include $(RIOTMAKE)/tools/serial.inc.mk
+
+# setup the flash tool used
 ifeq ($(PROGRAMMER),jlink)
     # in case J-Link is attached to SWD pins, use a plain CPU memory model
     export JLINK_DEVICE := atsamw25
     include $(RIOTMAKE)/tools/jlink.inc.mk
 else
-    # when BOSSA is used (default), use a different flash map
-    # refer https://github.com/shumatech/BOSSA for this programmer
-    export PROGRAMMER = bossa
+    # on default, we use BOSSA to flash this board
     export LINKER_SCRIPT ?= $(RIOTCPU)/sam0_common/ldscripts/$(CPU_MODEL)_mkr1000.ld
-
-    # define board specific flasher options
-    export FLASHER = $(RIOTBOARD)/$(BOARD)/dist/flash.sh
-    export OFLAGS = -O binary
+    include $(RIOTMAKE)/tools/bossa.inc.mk
 endif
 
-# setup serial terminal
-include $(RIOTMAKE)/tools/serial.inc.mk
-
 # setup the boards dependencies
 include $(RIOTBOARD)/$(BOARD)/Makefile.dep

boards/arduino-mkr1000/dist/flash.sh

@@ -1,14 +0,0 @@
-#!/bin/sh
-
-# To put the board in update mode, manually double press the reset button before
-# running `make flash`.
-
-if [ `uname` = "Linux" ]; then
-    stty -F "${PORT}" raw ispeed 1200 ospeed 1200 cs8 -cstopb ignpar eol 255 eof 255
-    "${RIOTBOARD}"/"${BOARD}"/dist/bossac --port=${PORT} -i -b -U true -i -e -w -v "${HEXFILE}" -R
-elif [ `uname` = "Darwin" ]; then
-    stty -f ${PORT} raw ispeed 1200 ospeed 1200 cs8 -cstopb ignpar eol 255 eof 255
-    "${RIOTBOARD}"/"${BOARD}"/dist/bossac_osx --port=${PORT} -i -b -U true -i -e -w -v "${HEXFILE}" -R
-else
-    echo "CAUTION: No flash tool for your host system found!"
-fi