HDR_ADDITIONAL_CONST_LEN_MSB
[HDR_ADDITIONAL_CONST_LEN_MSB] = GENMASK(21, 20),
[HDR_ADDITIONAL_CONST_LEN_MSB] = GENMASK(21, 20),
[HDR_ADDITIONAL_CONST_LEN_MSB] = GENMASK(21, 20),
[HDR_ADDITIONAL_CONST_LEN_MSB] = GENMASK(21, 20),
[HDR_ADDITIONAL_CONST_LEN_MSB] = GENMASK(21, 20),
[HDR_ADDITIONAL_CONST_LEN_MSB] = GENMASK(21, 20),