mdadm: Cleanup conditionals

mdadm: Cleanup conditionals

Be more consistent in the formatting of conditionals. Don't split on
multiple lines if not needed, don't overflow the 80 character line
length, put the condition operator at the end of the line of
multi-line conditionals, etc.

This should be purely cosmetic.... famous last words!

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>