PLL45XX_MDIV_SHIFT
mdiv = (pll_con >> PLL45XX_MDIV_SHIFT) & PLL45XX_MDIV_MASK;
old_mdiv = (pll_con0 >> PLL45XX_MDIV_SHIFT) & PLL45XX_MDIV_MASK;
con0 &= ~((PLL45XX_MDIV_MASK << PLL45XX_MDIV_SHIFT) |
con0 |= (rate->mdiv << PLL45XX_MDIV_SHIFT) |