CGX_PFC_CLASS_MASK
pfc_en |= FIELD_GET(CGX_PFC_CLASS_MASK, cfg);
cfg = FIELD_SET(CGX_PFC_CLASS_MASK, pfc_en, cfg);
cfg = FIELD_SET(CGX_PFC_CLASS_MASK, 0, cfg);
cfg = FIELD_SET(CGX_PFC_CLASS_MASK, 0, cfg);