btrfs: accessors: rename variable for folio offset

There used to be 'oip' short for offset in page, which got changed
during conversion to folios, the name is a bit confusing so rename it.

Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2025-07-06 20:23:58 +02:00
commit 72b2b199d5