[ros-diffs] [ion] 24759: - Delete HAL cruft files. - Implement (or cleanup + mark as implemented, these are 4 line functions) HalDisplayString, HalAcquireDisplayOwnership, HalSetDisplayParameters, HalQueryDisplayParameters, HalInitailizeProcessor, HalAllProcessorsStarted, HalStartNextProcessor, HalProcessorIdle, HalRequestIpi. - Fix some prototype definitions and cleanup some formatting.