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/Graphics/Console/GenericFramebufferConsole.h

@@ -81,7 +81,7 @@ protected:
 
     virtual void clear_glyph(size_t x, size_t y) override;
 
-    mutable Spinlock m_lock;
+    mutable Spinlock m_lock { LockRank::None };
 };
 
 }