f2fs: Convert clear_node_page_dirty() to clear_node_folio_dirty()

Both callers have a folio so pass it in, removing five calls to
compound_head().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>