linux-imx

udf: Use time64_to_tm for timestamp conversion

UDF on-disk time stamp is stored in a form very similar to struct tm.
Use time64_to_tm() for conversion of seconds since epoch to year, month,
... format and then just copy this as necessary to UDF on-disk
structure to simplify the code.

Signed-off-by: Jan Kara <jack@suse.cz>