Since mlc->lcv_t is only interested in seconds, directly using time64_t
here.

This gets rid of the deprecated do_gettimeofday() and avoids problems
with time going backwards since we now use the monotonic clocksource.
Signed-off-by: WEN Pingbo <pingbo.wen@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Patchwork-Id: 10076611
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>