riscv: dts: canaan: add reset controller for K230

Add the reset controller node for the K230 SoC. Also add the reset
properties for all UART nodes.

Signed-off-by: Junhui Liu <junhui.liu@pigmoral.tech>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
1 file changed