V4L/DVB (5965): Frontend_ioctl(): fix check-after-use

The Coverity checker spotted that we have already oops'ed if "fe" was NULL.

Since "fe" being NULL seems impossible at this point this patch removes
the NULL check.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Acked-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/dvb/dvb-core/dvb_frontend.c

@@ -748,7 +748,7 @@ static int dvb_frontend_ioctl(struct inode *inode, struct file *file,
 
 	dprintk ("%s\n", __FUNCTION__);
 
-	if (!fe || fepriv->exit)
+	if (fepriv->exit)
 		return -ENODEV;
 
 	if ((file->f_flags & O_ACCMODE) == O_RDONLY &&