CP-17631: Fix formatting of qemu display-related arguments
CP-17631: Fix formatting of qemu display-related arguments

Signed-off-by: Si Beaumont <a0992b7f1f450b4c7716d34b81a2d6f0877ae11a@citrix.com>

euanh/xenopsd,thomassa/xenopsd,thomassa/xenopsd,euanh/xenopsd,thomassa/xenopsd,euanh/xenopsd