samples: video: tcpserversink: Use mt9m114 camera shield

Update the sample to use a camera shield with a camera chosen node.
This is not only because the camera nodes in the mimxrt1064 device
tree has been now moved to a separate mt9m114 shield but also to
make the sample more generic.

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