pthread_cond remove csection

reason:
We decouple semcount from business logic by using an independent counting variable,
which allows us to remove critical sections in many cases.

Signed-off-by: hujun5 <hujun5@xiaomi.com>

libs/libc/pthread/pthread_condinit.c

@@ -74,6 +74,7 @@ int pthread_cond_init(FAR pthread_cond_t *cond,
   else
     {
       cond->clockid = attr ? attr->clockid : CLOCK_REALTIME;
+      cond->lock_count = 0;
     }
 
   sinfo("Returning %d\n", ret);