rtw88: fix use after free in rtw_hw_scan_update_probe_req()

rtw88: fix use after free in rtw_hw_scan_update_probe_req()

[ Upstream commit a954f29aea5d2cf58feedf83235edf3367229a37 ]

This code needs to use skb_queue_walk_safe() instead of skb_queue_walk()
because it frees the list iterator.

Fixes: d95984b5580d ("rtw88: fix memory overrun and memory leak during hw_scan")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220203082532.GA25151@kili
Signed-off-by: Sasha Levin <sashal@kernel.org>