all: Update @gebart family name, email

boards/mulle/board.c

boards/mulle/board_config.c

boards/mulle/include/at86rf2xx_params.h

boards/mulle/include/board.h

boards/mulle/include/periph_conf.h

core/atomic.c

core/c11_atomic.c

core/include/atomic.h

core/mutex.c

core/panic.c

cpu/cortexm_common/atomic_arch.c

cpu/cortexm_common/include/cpu.h

cpu/cortexm_common/panic.c

cpu/cortexm_common/thread_arch.c

cpu/k60/cpu.c

cpu/k60/include/MK60-comp.h

cpu/k60/include/cpu_conf.h

cpu/k60/include/devio-null.h

cpu/k60/include/devio-uart.h

cpu/k60/include/devopttab.h