wic: don't forcibly pass -T default

wic: don't forcibly pass -T default

This reverts part of oe-core eecbe62555, which was a previous attempt
to solve the Y2038 problem.  This is now solved centrally in e2fsprogs,
so doesn't need to be dealt with in wic.

We don't revert the commit entirely, to retain the warning if a
filesystem has small inodes.

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 7e8017208bed98b6c90735cb641fc9d7aedf9140)
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>