arch-arm: Add insert method to the TlbEntry

Change-Id: I664b03b61e4540025c6cebaa4a7298297565c76b
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>

src/arch/arm/pagetable.hh

@@ -358,6 +358,9 @@ struct TlbEntry : public ReplaceableEntry, Serializable
         valid = false;
     }
 
+    /** Need for compliance with the AssociativeCache interface */
+    void insert(const Lookup &lookup) {}
+
     void
     updateVaddr(Addr new_vaddr)
     {