staging: dgap: remove redundant NULL check in dgap_tty_init()

The brd is already checked by earlier function in dgap_init_one().
Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dgap/dgap.c

@@ -1363,9 +1363,6 @@ static int dgap_tty_init(struct board_t *brd)
 	struct cm_t __iomem *cm;
 	int ret;
 
-	if (!brd)
-		return -EIO;
-
 	/*
 	 * Initialize board structure elements.
 	 */