boards/stm32-based: added missing CLOCK_APBx defines

boards/iotlab-common/include/periph_conf_common.h

boards/limifrog-v1/include/periph_conf.h

boards/nucleo-f030/include/periph_conf.h

boards/nucleo-f070/include/periph_conf.h

boards/nucleo-f072/include/periph_conf.h

boards/nucleo-f091/include/periph_conf.h

boards/nucleo-f103/include/periph_conf.h

boards/nucleo-f303/include/periph_conf.h

boards/nucleo-f334/include/periph_conf.h

boards/nucleo-l1/include/periph_conf.h

boards/stm32f0discovery/include/periph_conf.h

boards/stm32f3discovery/include/periph_conf.h