imsm: fix tpv drvies check in add_to_super

imsm: fix tpv drvies check in add_to_super

Before the mentioned patch, the check to verify if IMSM on current
platform supports a use of TPV (other than Intel) disk, was only performed
for non-Intel disks, after it is performed for all. This change causes
inability to use any disk when platform does not support TPV drives,
attempt results in the following error.

mdadm:  Platform configuration does not support non-Intel NVMe drives.
        Please refer to Intel(R) RSTe/VROC user guide.

This change restores the check if the disk is non-Intel.

Fixes: 734e7db4dfc5 ("imsm: Remove warning and refactor add_to_super_imsm code")
Signed-off-by: Blazej Kucman <blazej.kucman@intel.com>