a bug in the function declaration "nvme_discontig" in "nvme.h"

[Cautreoxit]

In the file hw/femu/nvme.h, the function nvme_discontig's declaration seems to have some bug:
In the declaration, the second parameter is page_size, and the third parameter is queue_idx;
But when it is called, in all other functions, the second parameter is always queue_idx, and the third parameter is page_size.
I think the declaration should exchage these two parameters.

[huaicheng]

You're right. Thanks for helping point this out! Do you mind submitting a one-liner patch to fix this?