FROMGIT: f2fs: convert f2fs__page tracepoint class to use folio

Convert f2fs__page tracepoint class() and its instances to use folio
and related functionality, and rename it to f2fs__folio().

Change-Id: I0814125d1bc1203381101fe8947321baa7ed5417
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
(cherry picked from commit 92f750d8
https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git dev)