HDA_CORBWP_CORBWP
AZ_WRITE_2(az, CORBWP, corbwp & ~HDA_CORBWP_CORBWP);
wp = corbwp & HDA_CORBWP_CORBWP;
AZ_WRITE_2(az, CORBWP, (corbwp & ~HDA_CORBWP_CORBWP) | wp);