test-runner: virtio: Use appropriate index size

vq_ready would cease to be accurate after 64k messages because the
virtio index would wrap around, but the 'old' index would not.

Bug: 178591639
Change-Id: I7c0100215ed6450bd13fee80f628b309053dcdbd
1 file changed
tree: 53c586a4374bbcc007f9d5e41f3f45e0cf4795b7
  1. interface/
  2. ql-tipc/
  3. test-runner/
  4. .clang-format
  5. PREUPLOAD.cfg