clk: rockchip: protect critical clocks from getting disabled

The clock-tree contains clocks that should never get disabled automatically.
One example are the base ACLKs, the base supplies for all peripherals.

Therefore add a structure similar to the sunxi clock-tree to protect these
special clocks from being disabled.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
ARM: rockchip: enable the AMBA bus

This is needed to access the pl330 dma controllers on Rockchip SoCs.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
add support for pl330 dma/amba
- add another in dtsi file
- add Kconfig support need by pl330

Change-Id: I9226f9073723377f32a1bffab272fb72051b3cb7