udf: Convert udf_expand_file_adinicb() to use a folio

Use the folio APIs throughout this function.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Fixes: 1eeceaec ("udf: Convert udf_expand_file_adinicb() to avoid kmap_atomic()")
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20240417150416.752929-4-willy@infradead.org>