ath10k: fix memory leak on caldata on error exit path

caldata is not being free'd on the error exit path, causing
a memory leak and data definitely should not be freed. Free
caldata instead of data.

Thanks to Kalle Valo for spotting that data should not be
free'd.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath10k/pci.c

@@ -2726,7 +2726,7 @@ static int ath10k_pci_hif_fetch_cal_eeprom(struct ath10k *ar, void **data,
 	return 0;
 
 err_free:
-	kfree(data);
+	kfree(caldata);
 
 	return -EINVAL;
 }