BREAKING CHANGE: Remove BOARDIOC_INIT macro now that the interface is
removed in favour of CONFIG_BOARD_LATE_INITIALIZE.
Quick fix: instead of calling BOARDIOC_INIT from your application,
instead enable late initialization to have it performed automatically
prior to application entry.
If you need custom initialization logic, use the board_final_initialize
function and `BOARDIOC_FINALINIT` command instead.
Signed-off-by: Matteo Golin <matteo.golin@gmail.com>