staging: dgnc: remove unused variable 'intr_modem'

The 'intr_modem' variable was used only for increasing.
So the 'intr_modem' variable is not useful for this driver.
Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dgnc/dgnc_cls.c

@@ -603,7 +603,6 @@ static inline void cls_parse_isr(struct dgnc_board *brd, uint port)
 
 		/* CTS/RTS change of state */
 		if (isr & UART_IIR_CTSRTS) {
-			brd->intr_modem++;
 			ch->ch_intr_modem++;
 			/*
 			 * Don't need to do anything, the cls_parse_modem

drivers/staging/dgnc/dgnc_driver.h

@@ -183,7 +183,6 @@ struct dgnc_board {
 	uint		nasync;		/* Number of ports on card */
 
 	uint		irq;		/* Interrupt request number */
-	ulong		intr_modem;	/* Count of interrupts */
 	ulong		intr_tx;	/* Count of interrupts */
 	ulong		intr_rx;	/* Count of interrupts */
 

drivers/staging/dgnc/dgnc_neo.c

@@ -452,7 +452,6 @@ static inline void neo_parse_isr(struct dgnc_board *brd, uint port)
 			 * If we get here, this means the hardware is doing auto flow control.
 			 * Check to see whether RTS/DTR or CTS/DSR caused this interrupt.
 			 */
-			brd->intr_modem++;
 			ch->ch_intr_modem++;
 			cause = readb(&ch->ch_neo_uart->mcr);
 			/* Which pin is doing auto flow? RTS or DTR? */