nvme-pci: ensure we're polling a polled queue

[ Upstream commit 166e31d7dbf6aa44829b98aa446bda5c9580f12a ]

A user can change the polled queue count at run time. There's a brief
window during a reset where a hipri task may try to poll that queue
before the block layer has updated the queue maps, which would race with
the now interrupt driven queue and may cause double completions.

BUG=b/505690055
TEST=presubmit
RELEASE_NOTE=Fixed CVE-2026-31523 in the Linux kernel.

cos-patch: security-moderate
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Change-Id: Iff416c8702f2bfbb96812873244f33bc70013402
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kernel CVE Triage Automation <cloud-image-kernel-cve-triage-automation@prod.google.com>
Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/145910
Reviewed-by: Angel Adetula <angeladetula@google.com>
Reviewed-by: He Gao <hegao@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>