arm64: dts: rockchip: Add clk_rtc_32k to Anbernic xx3 Devices

For the Anbernic devices to display properly, we need to specify the
clock frequency of the PLL_VPLL. Adding the parent clock in the
rk356x.dtsi requires us to update our clock definitions to accomplish
this.

Fixes: 64b69474 ("arm64: dts: rockchip: assign rate to clk_rtc_32k on rk356x")
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Link: https://lore.kernel.org/r/20230327153547.821822-1-macroalpha82@gmail.com


Signed-off-by: Heiko Stuebner <heiko@sntech.de>