serial: ioc4_serial: Staticize ioc4_serial_attach_one()

ioc4_serial_attach_one() is used only in this file.
Also, ioc4_serial is not used; it can be removed.
Fix the following sparse warnings:

drivers/tty/serial/ioc4_serial.c:300:3: warning: symbol 'ioc4_serial' was not declared. Should it be static?
drivers/tty/serial/ioc4_serial.c:2771:1: warning: symbol 'ioc4_serial_attach_one' was not declared. Should it be static?
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Acked-by: NPatrick Gefre <pfg@sgi.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/ioc4_serial.c

@@ -297,7 +297,7 @@ struct ioc4_serial {
 	struct ioc4_uartregs uart_1;
 	struct ioc4_uartregs uart_2;
 	struct ioc4_uartregs uart_3;
-} ioc4_serial;
+};
 
 /* UART clock speed */
 #define IOC4_SER_XIN_CLK_66     66666667
@@ -2767,7 +2767,7 @@ ioc4_serial_core_attach(struct pci_dev *pdev, int port_type)
  *		called per card found from IOC4 master module.
  * @idd: Master module data for this IOC4
  */
-int
+static int
 ioc4_serial_attach_one(struct ioc4_driver_data *idd)
 {
 	unsigned long tmp_addr1;