wifi: carl9170: Remove redundant assignment to pointer super

The pointer super is being assigned a value that is not being read, it
is being re-assigned later. The assignment is redundant and can be
removed.

Cleans up clang scan warning:

drivers/net/wireless/ath/carl9170/tx.c:192:34: warning: Value stored to
'super' during its initialization is never read [deadcode.DeadStores]
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Acked-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://msgid.link/20240207171524.2458418-1-colin.i.king@gmail.com

drivers/net/wireless/ath/carl9170/tx.c

@@ -189,7 +189,7 @@ static void carl9170_tx_accounting_free(struct ar9170 *ar, struct sk_buff *skb)
 
 static int carl9170_alloc_dev_space(struct ar9170 *ar, struct sk_buff *skb)
 {
-	struct _carl9170_tx_superframe *super = (void *) skb->data;
+	struct _carl9170_tx_superframe *super;
 	unsigned int chunks;
 	int cookie = -1;