systemd-udevd: fix invoking init script failed

systemd-udevd: fix invoking init script failed

root@emenlow-noemgd:~# /etc/init.d/systemd-udevd restart
Stopping udevd
Starting udev
corrupt queue file
root@emenlow-noemgd:~# /etc/init.d/systemd-udevd status
udevd is stopped
root@emenlow-noemgd:~# ps
3805 root      8728 S    /lib/systemd/systemd-udevd

The process name is systemd-udevd rather than udev which is
used in systemd-udevd's init script.

[YOCTO #4746]

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>