It can be reproduced with non IMSM hardware and IMSM_NO_PLATFORM
environmental variable set. The array state is inactive when creating
an IMSM container. And the structure info is NULL because load_super()
always fails since no intel HBA information could be obtained.
Signed-off-by: Lidong Zhong <lidong.zhong@suse.com> Reported-by: Tkaczyk Mariusz <mariusz.tkaczyk@intel.com> Fixes: 64bf4dff3430 (Detail: show correct raid level when the array is inactive)