[test-runner] Support Legacy VirtIO Console (MMIO)

QEMU only supports the Legacy MMIO interface. As such, this is the
standard we need to use for the console.

Bug: 124277696
Change-Id: I60d9907f561e3170181c31849f95388f466b7d77
4 files changed
tree: 2772f038b4c12b0646b684a30bf04802c871f168
  1. .clang-format
  2. PREUPLOAD.cfg
  3. interface/
  4. ql-tipc/
  5. test-runner/