zonefs: select FS_IOMAP

Zonefs makes use of iomap internally, so it should also select iomap in
Kconfig.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
1 file changed