PLL46XX_MDIV_MASK
PLL1460X_MDIV_MASK : PLL46XX_MDIV_MASK);
old_mdiv = (pll_con0 >> PLL46XX_MDIV_SHIFT) & PLL46XX_MDIV_MASK;
con0 &= ~((PLL46XX_MDIV_MASK << PLL46XX_MDIV_SHIFT) |