mm:fix typos
./mm_heap/mm.h:86:27: error: expected '=', ',', ';', 'asm' or '__attribute__' before '*' token
86 |          FAR strcut tcb_s *tcb; \
{ \
FAR struct mm_allocnode_s *tmp = (FAR struct mm_allocnode_s *)(ptr); \
kasan_unpoison(tmp, SIZEOF_MM_ALLOCNODE); \
- FAR strcut tcb_s *tcb; \
+ FAR struct tcb_s *tcb; \
tmp->pid = gettid(); \
tcb = nxsched_get_tcb(tmp->pid); \
if ((heap)->mm_procfs.backtrace || (tcb && tcb->flags & TCB_FLAG_HEAP_DUMP)) \
