imsm: show correct size for arrays with 4k disks

Number of blocks used to calculate array size is based on 512 block size
so the size displayed is incorrect for arrays with 4k disks.

Signed-off-by: Maksymilian Kunt <maksymilian.kunt@intel.com>
Signed-off-by: Jes Sorensen <Jes.Sorensen@gmail.com>
1 file changed