MCLK_FB_DIV
pll->ct.mclk_fb_div = aty_ld_pll_ct(MCLK_FB_DIV, par);
mclk_fb_div = aty_ld_pll_ct(MCLK_FB_DIV, par);
aty_st_pll_ct(MCLK_FB_DIV, pll->ct.mclk_fb_div, par);