Kernel: Require lock rank for Spinlock construction

All users which relied on the default constructor use a None lock rank
for now. This will make it easier to in the future remove LockRank and
actually annotate the ranks by searching for None.

Kernel/Locking/Mutex.h

@@ -116,9 +116,11 @@ private:
             return mode == Mode::Exclusive ? exclusive : shared;
         }
     };
-    SpinlockProtected<BlockedThreadLists> m_blocked_thread_lists;
+    // FIXME: Use a specific lock rank passed by constructor.
+    SpinlockProtected<BlockedThreadLists> m_blocked_thread_lists { LockRank::None };
 
-    mutable Spinlock m_lock;
+    // FIXME: See above.
+    mutable Spinlock m_lock { LockRank::None };
 
 #if LOCK_SHARED_UPGRADE_DEBUG
     HashMap<Thread*, u32> m_shared_holders_map;

Kernel/Locking/SpinlockProtected.h

@@ -47,8 +47,9 @@ private:
 
 public:
     template<typename... Args>
-    SpinlockProtected(Args&&... args)
+    SpinlockProtected(LockRank rank, Args&&... args)
         : m_value(forward<Args>(args)...)
+        , m_spinlock(rank)
     {
     }