service: call kerndat_init() before feature check

setup_opts_from_req() sets up logging and call kerndat_init().

Investigated-by: Adrian Reber <areber@redhat.com>
Fixes: 6e04f3b2dd06 ("criu: call kerndat_init() after log_init()")
Signed-off-by: Andrei Vagin <avagin@gmail.com>