We might be interested on check if a file is empty or not. One use case
is check if the /sys/kernel/debug/devices_deferred file is not empty, in
such case mean that a driver is deferred for some reason so probe didn't
succeed.
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: Fabien Lahoudere <fabien.lahoudere@collabora.com>
