DRF_HI
#define DRF_BITS(drf) (DRF_HI(drf) - DRF_LO(drf) + 1)
#define DRF_HW_IDX(o,drf) (DRF_HI(DRF_MW(drf)) / DRF_MW_SIZE(o))
#define DRF_HW_HI(o,drf) (DRF_HI(DRF_MW(drf)) % DRF_MW_SIZE(o))
.size = DRF_HI(NV_EP_PCFGM) - DRF_LO(NV_EP_PCFGM) + 1,