net: freescale: ucc_geth: call of_node_put once

Move it up to avoid placing it in both the error and success paths.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260224014141.352642-1-rosenp@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>