clk: rockchip: fix rk3066 pll status register location

clk: rockchip: fix rk3066 pll status register location

The register providing the pll lock status is at a different address on the
rk3066. The error became apparent while working on cpufreq support for
the rockchip SoCs.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>