-#if defined(CONFIG_SYS_NS16550_SERIAL)
-extern struct serial_device eserial1_device;
-extern struct serial_device eserial2_device;
-extern struct serial_device eserial3_device;
-extern struct serial_device eserial4_device;
-#endif /* CONFIG_SYS_NS16550_SERIAL */
-
-#endif
-
-#if defined(CONFIG_MPC512X)
-extern struct serial_device serial1_device;
-extern struct serial_device serial3_device;
-extern struct serial_device serial4_device;
-extern struct serial_device serial6_device;
-#endif
-
-#if defined(CONFIG_XILINX_UARTLITE)
-extern struct serial_device uartlite_serial0_device;
-extern struct serial_device uartlite_serial1_device;
-extern struct serial_device uartlite_serial2_device;
-extern struct serial_device uartlite_serial3_device;
-#endif
-
-#if defined(CONFIG_OMAP3_ZOOM2)
-extern struct serial_device zoom2_serial_device0;
-extern struct serial_device zoom2_serial_device1;
-extern struct serial_device zoom2_serial_device2;
-extern struct serial_device zoom2_serial_device3;
-#endif
-
-#if defined(CONFIG_SYS_BFIN_UART)
-extern void serial_register_bfin_uart(void);
-extern struct serial_device bfin_serial0_device;
-extern struct serial_device bfin_serial1_device;
-extern struct serial_device bfin_serial2_device;
-extern struct serial_device bfin_serial3_device;