When converting Dell EMC PERC H755 RAID controller physical
disks to non-RAID mode, RAID-0 virtual disks get created
for each physical disk and disks moved to 'Online' state.
This is different from other controllers supporting non-RAID
conversion and takes up physical disks that cannot be
later used for user intended RAID configuration. This change
excludes H755 RAID controller's physical disks when converting
to non-RAID mode and leaves disks in 'Ready' state.
Change-Id: Id6de320c8e8a9ca21fac277718c405c657f58a3a