buffer: convert __block_commit_write() to take a folio

buffer: convert __block_commit_write() to take a folio

This removes a hidden call to compound_head() inside
__block_commit_write() and moves it to those callers which are still page
based.  Also make block_write_end() safe for large folios.

Link: https://lkml.kernel.org/r/20230612210141.730128-9-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Andreas Gruenbacher <agruenba@redhat.com>
Cc: Bob Peterson <rpeterso@redhat.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>