imsm: fix: report aligned component size value

imsm: fix: report aligned component size value

OROM can create array with chunk size not aligned.
To resolve this problem in mdadm, metadata handler has to report
component size aligned value for mdadm operations
while metadata value stays unchanged.

Do not correct alignment for raid1 and in error case.

Correction allows check in analyse_change() (Grow.c:905) to pass.

Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>