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/Bus/PCI/Access.h

@@ -53,8 +53,8 @@ private:
     Vector<Capability> get_capabilities(Address);
     Optional<u8> get_capabilities_pointer(Address address);
 
-    mutable RecursiveSpinlock m_access_lock;
-    mutable Spinlock m_scan_lock;
+    mutable RecursiveSpinlock m_access_lock { LockRank::None };
+    mutable Spinlock m_scan_lock { LockRank::None };
 
     HashMap<u32, NonnullOwnPtr<HostController>> m_host_controllers;
     Vector<DeviceIdentifier> m_device_identifiers;

Kernel/Bus/PCI/Controller/VolumeManagementDevice.h

@@ -29,7 +29,7 @@ private:
 
     // Note: All read and writes must be done with a spinlock because
     // Linux says that CPU might deadlock otherwise if access is not serialized.
-    Spinlock m_config_lock;
+    Spinlock m_config_lock { LockRank::None };
 };
 
 }