binder: modify the comment for binder_proc_unlock

Modify the comment for binder_proc_unlock() to clearly indicate which
spinlock it releases and to better match the acquire comment block
in binder_proc_lock().

Signed-off-by: Ba Jing <bajing@cmss.chinamobile.com>
Acked-by: Carlos Llamas <cmllamas@google.com>
Link: https://lore.kernel.org/r/20240902052330.3115-1-bajing@cmss.chinamobile.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Ba Jing

drivers/android/binder.c

@@ -277,7 +277,7 @@ _binder_proc_lock(struct binder_proc *proc, int line)
 }
 
 /**
- * binder_proc_unlock() - Release spinlock for given binder_proc
+ * binder_proc_unlock() - Release outer lock for given binder_proc
  * @proc:                struct binder_proc to acquire
  *
  * Release lock acquired via binder_proc_lock()