SNPS_PHY_MPLLB_FRACN2
intel_de_write(display, SNPS_PHY_MPLLB_FRACN2(phy), pll_state->mpllb_fracn2);
pll_state->mpllb_fracn2 = intel_de_read(display, SNPS_PHY_MPLLB_FRACN2(phy));