uboot-imx

arm64: rk3399: update rockchip_get_cru API

rk3399 has two clock-controller: cru and pmucru, update the
rockchip_get_crui() API, and rockchip_get_clk() do not used for
other module.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>