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/VGATextModeConsole.h

@@ -38,7 +38,7 @@ private:
 
     explicit VGATextModeConsole(NonnullOwnPtr<Memory::Region>);
 
-    mutable Spinlock m_vga_lock;
+    mutable Spinlock m_vga_lock { LockRank::None };
 
     NonnullOwnPtr<Memory::Region> m_vga_window_region;
     VirtualAddress m_current_vga_window;