idr: fix idr_replace()'s returned error code

idr: fix idr_replace()'s returned error code

When the smaller id is not found, idr_replace() returns -ENOENT.  But when
the id is bigger enough, idr_replace() returns -EINVAL, actually there is
no difference between these two kinds of ids.

These are all unallocated id, the return values of the idr_replace() for
these ids should be the same: -ENOENT.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>