samples: video: capture: Enhance logs readability

There are some compatibilty situations where carriage return does not
work (e.g. on Serial Monitor in VSCode). Moreover, keeping the
timestamps logs on the console would help to have an idea about the
frame rate. So, it's better to use line feed instead of carriage return
in this case.

Signed-off-by: Phi Bang Nguyen <phibang.nguyen@nxp.com>