qemu-1.4: add xenmou device configuration for dm-agent
qemu-1.4: add xenmou device configuration for dm-agent

ensure that we use xenmou device with qemu-dm
(not compatible with ioemu)a

OXT-118

Signed-off-by: Eric Chanudet <fdf29a0685e788af7c86638a759bdb17ff8838fa@gmail.com>

crogers1/toolstack,eric-ch/toolstack,eric-ch/toolstack,crogers1/toolstack,OpenXT/toolstack,ktemkin/openxt-toolstack,OpenXT/toolstack,ktemkin/openxt-toolstack