Implement 2.0 support in pblk. This includes the address formatting and
mapping paths, as well as the sysfs entries for them.
Signed-off-by: NJavier González <javier@cnexlabs.com>
Signed-off-by: NMatias Bjørling <mb@lightnvm.io>
Signed-off-by: NJens Axboe <axboe@kernel.dk>