UPSTREAM: f2fs: close unused open zones while mounting

Zoned UFS allows only 6 open zones at the same time, so we need to take
care of the count of open zones while mounting.

Change-Id: Ie197b9e9e47b3397446ce2cf97168c9f68fea431
Signed-off-by: Daeho Jeong <daehojeong@google.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
(cherry picked from commit 04abeb69)