staging: dgnc: UART_IIR_XOFF code is buggy

The UART_IIR_XOFF was supposed to be a no-op but, because there was a
missing semi-colon, the if statement is not "Empty".  I have just deleted
this code because it was supposed to be a no-op anyway.  UART_IIR_XOFF
is a standard define and not something specific to this driver.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dgnc/dgnc_cls.c

@@ -453,10 +453,6 @@ static inline void cls_parse_isr(struct dgnc_board *brd, uint port)
 			cls_copy_data_from_queue_to_uart(ch);
 		}
 
-		/* Received Xoff signal/Special character */
-		if (isr & UART_IIR_XOFF)
-			/* Empty */
-
 		/* CTS/RTS change of state */
 		if (isr & UART_IIR_CTSRTS) {
 			brd->intr_modem++;

drivers/staging/dgnc/dgnc_cls.h

@@ -61,7 +61,6 @@ struct cls_uart_struct {
 #define UART_16654_FCR_RXTRIGGER_56	0x80
 #define UART_16654_FCR_RXTRIGGER_60     0xC0
 
-#define UART_IIR_XOFF			0x10	/* Received Xoff signal/Special character */
 #define UART_IIR_CTSRTS			0x20	/* Received CTS/RTS change of state */
 #define UART_IIR_RDI_TIMEOUT		0x0C    /* Receiver data TIMEOUT */