Merge pull request #6881 from aabadie/mkrzero

boards/arduino-mkr-common/Makefile

boards/arduino-mkr-common/Makefile.dep

boards/arduino-mkr-common/Makefile.features

boards/arduino-mkr-common/Makefile.include

boards/arduino-mkr-common/board.c

boards/arduino-mkr-common/include/arduino_board.h

boards/arduino-mkr-common/include/arduino_pinmap.h

boards/arduino-mkr-common/include/board_common.h

boards/arduino-mkr-common/include/gpio_params.h

boards/arduino-mkr-common/include/periph_conf.h

boards/arduino-mkr1000/Makefile

boards/arduino-mkr1000/Makefile.dep

boards/arduino-mkr1000/Makefile.features

boards/arduino-mkr1000/Makefile.include

boards/arduino-mkr1000/include/board.h

boards/arduino-mkrzero/Makefile

boards/arduino-mkrzero/Makefile.dep

boards/arduino-mkrzero/Makefile.features

boards/arduino-mkrzero/Makefile.include

boards/arduino-mkrzero/include/board.h