staging: xillybus: Remove duplicate inclusion of list.h

list.h header file was included twice.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/xillybus/xillybus.h

@@ -21,7 +21,6 @@
 #include <linux/cdev.h>
 #include <linux/spinlock.h>
 #include <linux/mutex.h>
-#include <linux/list.h>
 #include <linux/workqueue.h>
 
 struct xilly_endpoint_hardware;