ARM: dts: stm32: add uart nodes on stm32mp13

Update device-tree stm32mp131.dtsi to add some uart features.

On uart 1, 2, 3, 5, 6, 7, 8 nodes, add compabible, exti interrupts, clock,
reset properties, dma config.

On uart 4 node, only add dma configuration and use exti interrupt.

Signed-off-by: Valentin Caron <valentin.caron@foss.st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>