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/FileSystem/SysFS/Subsystems/Bus/USB/BusDirectory.h

@@ -27,7 +27,7 @@ public:
 
 private:
     explicit SysFSUSBBusDirectory(SysFSBusDirectory&);
-    mutable Spinlock m_lock;
+    mutable Spinlock m_lock { LockRank::None };
 };
 
 }