This patches allows powermac IDE interface to use DB-DMA.
This implementation uses only synchronous I/O.
Signed-off-by: NLaurent Vivier <Laurent@lvivier.info>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6489 c046a42c-6fe2-441c-8c8c-71466251a162