Staging: ft1000-usb: use the correct list head

Using pdpram_blk here would cause an oops.  We intended to use
&freercvpool.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Tested by: Marek Belisko <marek.belisko@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/ft1000/ft1000-usb/ft1000_hw.c

@@ -1083,7 +1083,7 @@ u16 init_ft1000_netdev(struct ft1000_device *ft1000dev)
 
 
 err_free:
-	list_for_each_safe(cur, tmp, &pdpram_blk->list) {
+	list_for_each_safe(cur, tmp, &freercvpool) {
 		pdpram_blk = list_entry(cur, DPRAM_BLK, list);
 		list_del(&pdpram_blk->list);
 		kfree(pdpram_blk->pbuffer);