[PATCHv2] nvme: module parameter to disable pi with offsets

[Christoph Hellwig]

On Thu, Oct 24, 2024 at 08:27:02AM -0700, Keith Busch wrote:
> +static bool disable_pi = false;
> +module_param(disable_pi, bool, 0444);
> +MODULE_PARM_DESC(disable_pi, "disable protection information if it has an offset");
> +

The variable and module paramter are a bit misnamed now.  Also please
add a comment explaining why we have this seemingly odd flag.