Finish implementation of RK3299 clocks.

[mmel]

Summary

• implement of all but mmc clocks. MMC clocks will be added later by own commit.
• use 'link' clock type for external clocks.
• use local macros for doing named structure member initialization.

[mmel]

Add own version of clock ID's header without single copyright

[manu]

sys/arm64/rockchip/clk/rk3399_cru.c

846

It will make sense to have those defines in rk_cru.h I think.
And rename the SoC ones like PLL to PLL_3399 or something like that.

[mmel]

Move common macros to rk_cru.h