net: rswitch: Fix return value in rswitch_start_xmit()

stable inclusion
from stable-v6.6.5
commit 940af3fee268568a96511108c1b610227696cd69
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8N21P

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=940af3fee268568a96511108c1b610227696cd69



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[ Upstream commit 1aaef8634a20b322c82e84f12a9b6aec1e2fd4fa ]

This .ndo_start_xmit() function should return netdev_tx_t value,
not -ENOMEM. So, fix it.

Fixes: 33f5d733 ("net: renesas: rswitch: Improve TX timestamp accuracy")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>