nvme-auth: don't ignore key generation failures when initializing ctrl keys

[ Upstream commit 193a8c7e ]

nvme_auth_generate_key can fail, don't ignore it upon initialization.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Stable-dep-of: 7ed5cf8e ("nvme-core: fix dev_pm_qos memleak")
Signed-off-by: Sasha Levin <sashal@kernel.org>