[PATCH] nvme-auth: use IS_REACHABLE for nvme_auth_extract_key() declaration

[Keith Busch]

On Mon, Nov 03, 2025 at 07:46:07PM +0000, Chaitanya Kulkarni wrote:
> unless there is a specific need to replace IS_REACHABLE() by
> CONFIG_NVME_AUTH_STATE, can I please get Reviewed-by on this patch ?

I just folded it in when the build bot reported the error. This one was
pretty trivial and top of the stack already.