Fix bug with adding to 0.90 array

commit 7ccc4cc4fc6889680bbe4ec673cab3f6aa49aad3
    Manage: remove call to validate_geometry.

used entirely the wrong number for "4TB" !!

Signed-off-by: NeilBrown <neilb@suse.de>
super1: fix setting of data_offset for 1.0 metadata.

commit 23bf42cc79d46de019d4b27c16354a191a98ed41
    super1: simplify setting of array size.

removed the setting for sb->data_offset for 1.0 metadata for some reason,
and messed up the size calculation for 1.0 metadata too.

Signed-off-by: NeilBrown <neilb@suse.de>