hardware level IDE CD-ROM emulation - added second IDE interface for up to 4...

hardware level IDE CD-ROM emulation - added second IDE interface for up to 4 IDE disks emulation - added -boot command to enable CD boot


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@444 c046a42c-6fe2-441c-8c8c-71466251a162