btrfs: Use folio_next_pos()

btrfs: Use folio_next_pos()

btrfs defined its own variant of folio_next_pos() called folio_end().
This is an ambiguous name as 'end' might be exclusive or inclusive.
Switch to the new folio_next_pos().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Link: https://patch.msgid.link/20251024170822.1427218-3-willy@infradead.org
Acked-by: David Sterba <dsterba@suse.com>
Cc: Chris Mason <clm@fb.com>
Cc: David Sterba <dsterba@suse.com>
Cc: linux-btrfs@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>