UPSTREAM: Revert "f2fs: rebuild nat_bits during umount"

[ Upstream commit 19426c49 ]

This reverts commit 94c821fb.

It reports that there is potential corruption in node footer,
the most suspious feature is nat_bits, let's revert recovery
related code.

Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit b7cc9e3a)
Bug: 428794803
Bug: 433620119
Change-Id: Id32418b9e4f1cf3369bec8a44e23a070e9f84793
[jstultz: Slight tweak to the footer order, to keep the top part matching the commit from -stable]
Signed-off-by: John Stultz <jstultz@google.com>
(cherry picked from commit add77f4f)