btrfs: zoned: print block-group type for zoned statistics

btrfs: zoned: print block-group type for zoned statistics

When printing the zoned statistics, also include the block-group type in
the block-group listing output.

The updated output looks as follows:

 device /dev/vda mounted on /mnt with fstype btrfs
   zoned statistics:
         active block-groups: 9
           reclaimable: 0
           unused: 2
           need reclaim: false
         data relocation block-group: 3221225472
         active zones:
           start: 1073741824, wp: 268419072 used: 268419072, reserved: 0, unusable: 0 (DATA)
           start: 1342177280, wp: 0 used: 0, reserved: 0, unusable: 0 (DATA)
           start: 1610612736, wp: 81920 used: 16384, reserved: 16384, unusable: 49152 (SYSTEM)
           start: 1879048192, wp: 2031616 used: 1458176, reserved: 65536, unusable: 507904 (METADATA)
           start: 2147483648, wp: 268419072 used: 268419072, reserved: 0, unusable: 0 (DATA)
           start: 2415919104, wp: 268419072 used: 268419072, reserved: 0, unusable: 0 (DATA)
           start: 2684354560, wp: 268419072 used: 268419072, reserved: 0, unusable: 0 (DATA)
           start: 2952790016, wp: 65536 used: 65536, reserved: 0, unusable: 0 (DATA)
           start: 3221225472, wp: 0 used: 0, reserved: 0, unusable: 0 (DATA)

Reviewed-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>