v4l2-sysfs-path: Show devices ordered by the video node number

v4l2-sysfs-path: Show devices ordered by the video node number

Instead of calling the default print function, it implements its
own logic that will print all devices video ordered, plus the
audio playback devices. The output will be something like:

Video device: video0
	vbi: vbi0
	dvb frontend: dvb0.frontend0
	dvb demux: dvb0.demux0
	dvb dvr: dvb0.dvr0
	dvb net: dvb0.net0
	sound card: hw:2
	pcm capture: hw:2,0
	mixer: hw:2
Video device: video1
	sound card: hw:1
	pcm capture: hw:1,0
	mixer: hw:1
Alsa playback device(s): hw:0,0 hw:0,1

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>