Remove unused variable 'retval' in function 'tnt4882_update_status'.

A call to nec7210_update_status_nolock() is added as the status bits are written
to board->status in that function.

This change removes the following warning:

warning: variable ‘retval’ set but not used [-Wunused-but-set-variable]

Signed-off-by: Gaston Gonzalez <gascoar@gmail.com>
---
v2: add call to nec7210_update_status_nolock() function.

 drivers/staging/gpib/tnt4882/tnt4882_gpib.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/staging/gpib/tnt4882/tnt4882_gpib.c b/drivers/staging/gpib/tnt4882/tnt4882_gpib.c
index 2e1c3cbebaca..19f6d798f09c 100644
--- a/drivers/staging/gpib/tnt4882/tnt4882_gpib.c
+++ b/drivers/staging/gpib/tnt4882/tnt4882_gpib.c
@@ -704,12 +704,11 @@ static unsigned int tnt4882_update_status(gpib_board_t *board, unsigned int clea
 {
 	unsigned long flags;
 	u8 line_status;
-	unsigned int retval;
 	struct tnt4882_priv *priv = board->private_data;
 
 	spin_lock_irqsave(&board->spinlock, flags);
 	board->status &= ~clear_mask;
-	retval = nec7210_update_status_nolock(board, &priv->nec7210_priv);
+	nec7210_update_status_nolock(board, &priv->nec7210_priv);
 	/* set / clear SRQ state since it is not cleared by interrupt */
 	line_status = tnt_readb(priv, BSR);
 	if (line_status & BCSR_SRQ_BIT)
-- 
2.48.1