kern: audit (and fix) our hardware maintenance instructions to match official kernel

libraries/libmesosphere/include/mesosphere/kern_k_dynamic_resource_manager.hpp

@@ -46,7 +46,7 @@ namespace ams::kern {
                 return m_slab_heap->Allocate(m_page_allocator);
             }
 
-            void Free(T *t) const {
+            ALWAYS_INLINE void Free(T *t) const {
                 m_slab_heap->Free(t);
             }
     };