With the target opp, also pass the old opp to config_clks function. This can be useful when a driver needs to take decision on what fequency to set based on what is the current frequency without using a clk_get_freq call. Update the only user of custom config_clks (tegra30 devfreq driver) to this new implementation. Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>