[PATCH] ide-probe updates

Fix crash with slave and no master
Fix crash with hdb=noprobe hdb=cdrom
Fix crash with pre ATA devices refusing IDENTIFY
Fix flash slave making master disappear
Add interfaces that the PPC uses to do disk spin up when the BIOS has not
Add framework to allow hdparm -d1 on a box built with IDE_DMA_ONLYDISK
Fix identify framework so we can fix the proc identify crash too