f2fs: use inode pointer for {set, clear}_inode_flag

This patch refactors to use inode pointer for set_inode_flag and
clear_inode_flag.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 2e6f537..77dc929 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -241,7 +241,7 @@
 {
 	struct f2fs_inode_info *fi = F2FS_I(inode);
 
-	clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
+	clear_inode_flag(inode, FI_ATOMIC_FILE);
 
 	mutex_lock(&fi->inmem_lock);
 	__revoke_inmem_pages(inode, &fi->inmem_pages, true, false);