format shouldn't allow write SMI label to disk with EFI partition
If disk has an EFI partition, but efi label is missing, format allows to write SMI label (and think that disk has SMI label):
(after clearing efi label with dd):
 SMI Label
 EFI Label
Specify Label type : 0
Ready to label disk, continue? y
And disk with EFI partition gets it senseless SMI label.
Before writing SMI label, format should call existing warning about deleting EFI partition and creating new Solaris partition.
Also if disk has no label but EFI partition and user selected EFI label, format reports that the disk has a SMI label, that's wrong.