V4L/DVB (11325): soc-camera: fix breakage caused by 13e0419aca3486a5bebc36a2c40fc28b0...

V4L/DVB (11325): soc-camera: fix breakage caused by 13e0419aca3486a5bebc36a2c40fc28b0362e0eb

soc-camera re-uses struct devices multiple times in calls to device_register(),
therefore it has to reset the embedded struct kobject to avoid the "tried to
init an initialized object" error, which then also erases its name. Now with
the transition to kobject's name for device names, we have to re-initialise the
name before each call to device_register().

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>