staging: dgnc: Remove useless cast on void pointer

void pointers do not need to be cast to other pointer types.

The semantic patch used to find this:

@r@
expression x;
void* e;
type T;
identifier f;
@@

(
  *((T *)e)
|
  ((T *)x)[...]
|
  ((T *)x)->f
|
- (T *)
  e
)

Build tested it.
Signed-off-by: Tapasweni Pathak <tapaswenipathak@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dgnc/dgnc_cls.c

@@ -792,7 +792,7 @@ static void cls_tasklet(unsigned long data)
  */
 static irqreturn_t cls_intr(int irq, void *voidbrd)
 {
-	struct dgnc_board *brd = (struct dgnc_board *) voidbrd;
+	struct dgnc_board *brd = voidbrd;
 	uint i = 0;
 	unsigned char poll_reg;
 	unsigned long flags;

drivers/staging/dgnc/dgnc_neo.c

@@ -944,7 +944,7 @@ static void neo_tasklet(unsigned long data)
  */
 static irqreturn_t neo_intr(int irq, void *voidbrd)
 {
-	struct dgnc_board *brd = (struct dgnc_board *) voidbrd;
+	struct dgnc_board *brd = voidbrd;
 	struct channel_t *ch;
 	int port = 0;
 	int type = 0;