The fix for https://storyboard.openstack.org/#!/story/2008252 synced
the boot mode after changing the boot device, because Supermicro nodes
reset the boot mode if not included in the boot device set. However this
can cause a problem on Dell nodes when changing the mode uefi->bios or
bios->uefi. Restrict the syncing of the boot mode to Supermicro.
(cherry picked from commit 8bd25a9882e64ae378974e974c39b874d4b9b0e8)