clk: starfive: jh7110: Add security clocks

Add STGCLK_SEC_HCLK and STGCLK_SEC_MISCAHB clocks for JH7110 TRNG
device.

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