Use the declared power drain for p2p tunnels (#4567)

src/main/java/appeng/parts/p2p/FluidP2PTunnelPart.java

@@ -54,7 +54,8 @@ public class FluidP2PTunnelPart extends P2PTunnelPart<FluidP2PTunnelPart> {
         return MODELS.getModels();
     }
 
-    public float getPowerDrainPerTick() {
+    @Override
+    protected float getPowerDrainPerTick() {
         return 2.0f;
     }