rockchip: rk35xx: Remove unnecessary status props

Remove unnecessary status props from rk35xx u-boot.dtsi files, regular
device tree files or default value already enable the affected nodes.

Also reorder bootph-pre-ram and clock-frequency props alphabetically in
rk3588s-u-boot.dtsi uart2 node.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>