nvme: do not advertise support for unsupported arbitration mechanism

The device mistakenly reports that the Weighted Round Robin with Urgent
Priority Class arbitration mechanism is supported.

It is not.
Signed-off-by: NKlaus Birkelund Jensen <klaus.jensen@cnexlabs.com>
Message-id: 20190606092530.14206-1-klaus@birkelund.eu
Acked-by: NMaxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: NMax Reitz <mreitz@redhat.com>

hw/block/nvme.c

@@ -1384,7 +1384,6 @@ static void nvme_realize(PCIDevice *pci_dev, Error **errp)
     n->bar.cap = 0;
     NVME_CAP_SET_MQES(n->bar.cap, 0x7ff);
     NVME_CAP_SET_CQR(n->bar.cap, 1);
-    NVME_CAP_SET_AMS(n->bar.cap, 1);
     NVME_CAP_SET_TO(n->bar.cap, 0xf);
     NVME_CAP_SET_CSS(n->bar.cap, 1);
     NVME_CAP_SET_MPSMAX(n->bar.cap, 4);