arm: colibri-vf: Enable serial support

- Enable lpuart support on Toradex Colibri VF50/VF61
- Use UART0 for stdout.

Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
1 file changed