Merge pull request #3126 from jfischer-phytec-iot/pr@frdm-k64f

boards/frdm-k64f/Makefile

boards/frdm-k64f/Makefile.dep

boards/frdm-k64f/Makefile.features

boards/frdm-k64f/Makefile.include

boards/frdm-k64f/board.c

boards/frdm-k64f/dist/openocd.cfg

boards/frdm-k64f/include/board.h

boards/frdm-k64f/include/periph_conf.h

cpu/k64f/Makefile

cpu/k64f/Makefile.include

cpu/k64f/cpu.c

cpu/k64f/include/MK64F12.h

cpu/k64f/include/cpu_conf.h

cpu/k64f/ldscripts/mk64fn1m0vll12.ld

cpu/k64f/lpm_arch.c

cpu/k64f/periph/Makefile

cpu/k64f/vectors.c

doc/doxygen/riot.doxyfile