staging: rts5208: Remove unnecessary cast on void pointer

The following Coccinelle script was used to detect this:
@r@
expression x;
void* e;
type T;
identifier f;
@@
(
  *((T *)e)
|
  ((T *)x)[...]
|
  ((T*)x)->f
|
- (T*)
  e
)

Signed-off-by: simran singhal <singhalsimran0@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rts5208/rtsx_transport.c

@@ -766,8 +766,7 @@ int rtsx_transfer_data(struct rtsx_chip *chip, u8 card, void *buf, size_t len,
 		return -EIO;
 
 	if (use_sg) {
-		err = rtsx_transfer_sglist_adma(chip, card,
-						(struct scatterlist *)buf,
+		err = rtsx_transfer_sglist_adma(chip, card, buf,
 						use_sg, dma_dir, timeout);
 	} else {
 		err = rtsx_transfer_buf(chip, card, buf, len, dma_dir, timeout);