image_ipkg: add missing dependency

Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
v4l-utils: enable udev for media-ctl only

It's only used there, and the ptxdist dependency active when media-ctl is
enabled.

Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>