serial: exar: fix checkpach warnings

-Fix several "missing identifier name" warnings from checkpatch in
struct exar8250_platform and struct exar8250_board.
Example:

WARNING: function definition argument <arg> should also have an
identifier name

- Fix space before tab warning from checkpatch:
WARNING: please, no space before tabs
+ * 0^I^I2 ^IMode bit 0$

Signed-off-by: Parker Newman <pnewman@connecttech.com>
Link: https://lore.kernel.org/r/f7fa6c16cb5f2c8c1c7cb7d29f80bc7be53f91ab.1713382717.git.pnewman@connecttech.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: pnewman-cti

drivers/tty/serial/8250/8250_exar.c

@@ -147,7 +147,7 @@
  *
  * MPIO		Port	Function
  * ----		----	--------
- * 0		2 	Mode bit 0
+ * 0		2	Mode bit 0
  * 1		2	Mode bit 1
  * 2		2	Terminate bus
  * 3		-	<reserved>
@@ -229,8 +229,8 @@ struct exar8250_platform {
 	int (*rs485_config)(struct uart_port *port, struct ktermios *termios,
 			    struct serial_rs485 *rs485);
 	const struct serial_rs485 *rs485_supported;
-	int (*register_gpio)(struct pci_dev *, struct uart_8250_port *);
-	void (*unregister_gpio)(struct uart_8250_port *);
+	int (*register_gpio)(struct pci_dev *pcidev, struct uart_8250_port *port);
+	void (*unregister_gpio)(struct uart_8250_port *port);
 };
 
 /**
@@ -245,8 +245,8 @@ struct exar8250_board {
 	unsigned int num_ports;
 	unsigned int reg_shift;
 	int     (*board_init)(struct exar8250 *priv, struct pci_dev *pcidev);
-	int	(*setup)(struct exar8250 *, struct pci_dev *,
-			 struct uart_8250_port *, int);
+	int	(*setup)(struct exar8250 *priv, struct pci_dev *pcidev,
+			 struct uart_8250_port *port, int idx);
 	void	(*exit)(struct pci_dev *pcidev);
 };