HAL_Linux: change the return type of AP_HAL::Util::tonealarm_init() to signed int8_t.
This is a part of a set of fixes for the bugs and typos tridge discovered and shared inside earlier commits for setting up tonealarm.
AP_Notify:Fix the typo, usage of toshibaled.init() instead of toshibaled.update()
This is a part of a set of fixes for the bugs and typos tridge discovered and shared inside earlier commits for setting up tonealarm.
AP_Notify:change tonealarm-type bitmask to bool type,
change parameter data type from const uint8_t to uint8_t,
initialise tonealarm error flag to value -1 at tonealarm class initiallisation

This is a part of a set of fixes for the bugs and typos tridge discovered and shared inside earlier commits for setting up tonealarm.