libmultipath: fix error parsing "find_multipaths strict"

libmultipath: fix error parsing "find_multipaths strict"

If "find_multipaths strict" is set in multipath.conf, the error message
"illegal value for find_multipaths: strict" is printed. This causes no
functional problem, as "strict" happens to be the default, fallback
value. It should be fixed nonetheless. FIND_MULTIPATHS_STRICT, having
the highest numeric value, must be last in the enum.

Fixes: c36f2f42 "libmultipath: change find_multipaths option to multi-value"
Signed-off-by: Martin Wilck <mwilck@suse.com>