ARM: dts: rockchip: set default rates for core clocks on rk322x

Set sane default frequencies for CPLL, GPLL and some other core clocks
on the rk322x.

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>