PCH_INTERRUPT_PIPE_IDENTITY_BDW
const uint32 regIdentity = PCH_INTERRUPT_PIPE_IDENTITY_BDW(INTEL_PIPE_A);
const uint32 regIdentity = PCH_INTERRUPT_PIPE_IDENTITY_BDW(INTEL_PIPE_B);
const uint32 regIdentity = PCH_INTERRUPT_PIPE_IDENTITY_BDW(INTEL_PIPE_C);
const uint32 regIdentity = PCH_INTERRUPT_PIPE_IDENTITY_BDW(pipe);