SSPPLLCTL_FSEL
reg &= ~SSPPLLCTL_FSEL;
reg |= FIELD_PREP(SSPPLLCTL_FSEL, 7);
reg |= FIELD_PREP(SSPPLLCTL_FSEL, 6);
reg |= FIELD_PREP(SSPPLLCTL_FSEL, 2);
reg |= FIELD_PREP(SSPPLLCTL_FSEL, 1);
reg |= FIELD_PREP(SSPPLLCTL_FSEL, 0);