staging: dgnc: Remove not needed dgnc_driver_start variable

The dgnc_driver_start variable purpose was to indicate if the driver
'start' routine has been called. Now, because the 'start' routine can
only be called once this variable is not needed thus this commit
removes it.
Signed-off-by: Konrad Zapalowicz <bergo.torino@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dgnc/dgnc_driver.c

@@ -97,7 +97,6 @@ int			dgnc_poll_tick = 20;	/* Poll interval - 20 ms */
  * Static vars.
  */
 static uint		dgnc_Major_Control_Registered = FALSE;
-static uint		dgnc_driver_start = FALSE;
 
 static struct class *dgnc_class;
 
@@ -270,10 +269,6 @@ static int dgnc_start(void)
 	int rc = 0;
 	unsigned long flags;
 
-	if (dgnc_driver_start == TRUE)
-		return rc;
-	dgnc_driver_start = TRUE;
-
 	/* make sure that the globals are init'd before we do anything else */
 	dgnc_init_globals();