Fix on-board audio on the GXL and the jumpers on the XPS P60 and 560/L.

src/machine/machine_table.c

@@ -17346,6 +17346,12 @@ machine_get_type(int m)
     return (machines[m].type);
 }
 
+int
+machine_get_chipset(int m)
+{
+    return (machines[m].chipset);
+}
+
 int
 machine_get_machine_from_internal_name(const char *s)
 {