serial: mrst_max3110: fix casting warning

max->port.membase is (unsigned char __iomem *); thus,
casting (unsigned char __iomem *) is necessary to fix
the following warning. Also, serial_m3110_ops() is staticized.

drivers/tty/serial/mrst_max3110.c:716:17: warning: symbol 'serial_m3110_ops' was not declared. Should it be static?
drivers/tty/serial/mrst_max3110.c:847:27: warning: incorrect type in assignment (different address spaces)
drivers/tty/serial/mrst_max3110.c:847:27:    expected unsigned char [noderef] <asn:2>*membase
drivers/tty/serial/mrst_max3110.c:847:27:    got void *<noident>
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/mrst_max3110.c

@@ -713,7 +713,7 @@ static void serial_m3110_enable_ms(struct uart_port *port)
 {
 }
 
-struct uart_ops serial_m3110_ops = {
+static struct uart_ops serial_m3110_ops = {
 	.tx_empty	= serial_m3110_tx_empty,
 	.set_mctrl	= serial_m3110_set_mctrl,
 	.get_mctrl	= serial_m3110_get_mctrl,
@@ -844,7 +844,7 @@ static int serial_m3110_probe(struct spi_device *spi)
 	pmax = max;
 
 	/* Give membase a psudo value to pass serial_core's check */
-	max->port.membase = (void *)0xff110000;
+	max->port.membase = (unsigned char __iomem *)0xff110000;
 	uart_add_one_port(&serial_m3110_reg, &max->port);
 
 	return 0;