Allow PFloat in divmod

Author: msimacek

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/floats/FloatBuiltins.java

@@ -637,7 +637,7 @@ PNotImplemented doGeneric(Object left, Object right) {
         }
 
         protected static boolean accepts(Object obj) {
-            return obj instanceof Double || obj instanceof Integer || obj instanceof Long || obj instanceof PInt;
+            return obj instanceof Double || obj instanceof Integer || obj instanceof Long || obj instanceof PInt || obj instanceof PFloat;
         }
     }