chip/c906_timerisr.c: In function 'up_timer_initialize': Error: chip/c906_timerisr.c:71:3: error: implicit declaration of function 'DEBUGASSERT' [-Werror=implicit-function-declaration] DEBUGASSERT(lower); ^~~~~~~~~~~ cc1: all warnings being treated as errors Signed-off-by: chao.an <anchao@xiaomi.com>