This series converts devices used by MIPS Magnum emulation to qdev devices.
Once applied, Magnum emulation will be fully creatable by a 
configuration file (see attached file)

usage:
qemu-system-mips64el -M empty -nodefaults -readconfig magnum
-netdev id=nic,type=user
-drive id=disk,format=qcow2,if=none,file=1G.qcow2
-drive id=cdrom,media=cdrom,format=raw,if=none,file=arccd.iso
-chardev id=serial0,backend=vc
-chardev id=serial1,backend=vc
-chardev id=parallel0,backend=vc

All feedback is very appreciated.

Regards,

Hervé