bcm53xx_freq_calc
clk->clk_genpll = bcm53xx_freq_calc(clk, pdiv, ndiv_int, ndiv_frac);
clk->clk_lcpll = bcm53xx_freq_calc(clk, pdiv, ndiv_int, ndiv_frac);
clk->clk_cpu = bcm53xx_freq_calc(clk, pdiv, ndiv_int, ndiv_frac) / cpu_div;