kinetis: add support for S9KEAZ128

cpu/kinetis/Makefile.features

cpu/kinetis/Makefile.include

cpu/kinetis/cpu.c

cpu/kinetis/fcfield.c

cpu/kinetis/include/cpu_conf.h

cpu/kinetis/include/cpu_conf_kinetis.h

cpu/kinetis/include/cpu_conf_kinetis_ea.h

cpu/kinetis/include/mcg.h

cpu/kinetis/include/periph_cpu.h

cpu/kinetis/include/vectors_kinetis.h

cpu/kinetis/include/vendor/SKEAZ1284.h

cpu/kinetis/include/vendor/system_SKEAZ1284.h

cpu/kinetis/isr_kinetis.c

cpu/kinetis/kinetis-info.mk

cpu/kinetis/periph/gpio.c

cpu/kinetis/periph/ics.c

cpu/kinetis/periph/timer.c

cpu/kinetis/periph/wdog.c

cpu/kinetis/vectors.c