wifi: brcmfmac: fix potential memory leak in brcmf_netdev_start_xmit()

stable inclusion
from stable-v5.10.173
commit e08e6812efb6a8c676e733de0518594d1517e0d9
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8BFR3

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=e08e6812efb6a8c676e733de0518594d1517e0d9



--------------------------------

[ Upstream commit 212fde3f ]

The brcmf_netdev_start_xmit() returns NETDEV_TX_OK without freeing skb
in case of pskb_expand_head() fails, add dev_kfree_skb() to fix it.
Compile tested only.

Fixes: 270a6c1f ("brcmfmac: rework headroom check in .start_xmit()")
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Reviewed-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/1668684782-47422-1-git-send-email-zhangchangzhong@huawei.com


Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: sanglipeng <sanglipeng1@jd.com>