batman-adv: Remove explicit casts cast from void* for store

It is not necessary to cast a void* to the pointer type when we just
store it and don't want to do pointer arithmetic before the actual
assignment.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
diff --git a/net/batman-adv/bitarray.c b/net/batman-adv/bitarray.c
index 767e237..700ee4f 100644
--- a/net/batman-adv/bitarray.c
+++ b/net/batman-adv/bitarray.c
@@ -130,7 +130,7 @@
 char bit_get_packet(void *priv, unsigned long *seq_bits,
 		    int32_t seq_num_diff, int8_t set_mark)
 {
-	struct bat_priv *bat_priv = (struct bat_priv *)priv;
+	struct bat_priv *bat_priv = priv;
 
 	/* sequence number is slightly older. We already got a sequence number
 	 * higher than this one, so we just mark it. */