nvme: mark nvme_setup_passsthru() inline

stable inclusion
from stable-v5.10.127
commit e7ccaa1abacf6f8b4fe4e0a06cbb9e2051a4d79e
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5XDDK

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=e7ccaa1abacf6f8b4fe4e0a06cbb9e2051a4d79e



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[ Upstream commit 7a366046 ]

Since nvmet_setup_passthru() function falls in fast path when called
from the NVMeOF passthru backend, make it inline.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Reviewed-by: Wei Li <liwei391@huawei.com>