clk: starfive: jh7110: Add watchdog clocks

Add JH7110_SYSCLK_WDT_APB and JH7110_SYSCLK_WDT_CORE clocks for JH7110
watchdog device.

Signed-off-by: Chanho Park <chanho61.park@samsung.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>