wifi: libertas: cmdresp: don't call kfree_skb() under spin_lock_irqsave()

wifi: libertas: cmdresp: don't call kfree_skb() under spin_lock_irqsave()

[ Upstream commit f7ca65778cff3ed79245a1535654a525e38051be ]

It is not allowed to call kfree_skb() from hardware interrupt
context or with interrupts being disabled. So replace kfree_skb()
with dev_kfree_skb_irq() under spin_lock_irqsave(). Compile
tested only.

Fixes: 30f484d59ae7 ("libertas: Add spinlock to avoid race condition")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20221207150008.111743-5-yangyingliang@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>