btrfs-progs: mkfs: output device list in sorted order

btrfs-progs: mkfs: output device list in sorted order

list_for_each_entry_reverse() in current code can not output
devices in sorted order, because the sequence are broken in
btrfs_alloc_chunk().

We can use list_sort() instead.

Before patch:
 # mkfs.btrfs -f /dev/vdd /dev/vde /dev/vdf
 ...
 Number of devices:  3
 Devices:
    ID        SIZE  PATH
     3     2.60GiB  /dev/vdf
     1     2.60GiB  /dev/vdd
     2     2.60GiB  /dev/vde

After patch:
 # mkfs.btrfs -f /dev/vdd /dev/vde /dev/vdf
 ...
 Number of devices:  3
 Devices:
    ID        SIZE  PATH
     1     2.60GiB  /dev/vdd
     2     2.60GiB  /dev/vde
     3     2.60GiB  /dev/vdf

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>