drivers: clk: hix5hd2 add watchdog0 clocks

hix5hd2 add watchdog0 clocks

Signed-off-by: Guoxiong Yan <yanguoxiong@huawei.com>
arm:dts: hix5hd2 add wdg0 device node

hix5hd2 add wdg0 device node

Signed-off-by: Jiancheng Xue <xuejiancheng@huawei.com>