drivers: hv: remove cast from hyperv_die_event

No need to cast a void pointer.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Link: https://lore.kernel.org/r/20200819090510.28995-1-olaf@aepfle.deSigned-off-by: Wei Liu <wei.liu@kernel.org>

drivers/hv/vmbus_drv.c

@@ -83,7 +83,7 @@ static int hyperv_panic_event(struct notifier_block *nb, unsigned long val,
 static int hyperv_die_event(struct notifier_block *nb, unsigned long val,
 			    void *args)
 {
-	struct die_args *die = (struct die_args *)args;
+	struct die_args *die = args;
 	struct pt_regs *regs = die->regs;
 
 	/* Don't notify Hyper-V if the die event is other than oops */