CH_CHID
val = reg_encode(reg, CH_CHID, channel_id);
[CH_CHID] = GENMASK(7, 0),
[CH_CHID] = GENMASK(7, 0),
[CH_CHID] = GENMASK(7, 0),
[CH_CHID] = GENMASK(7, 0),
[CH_CHID] = GENMASK(7, 0),
[CH_CHID] = GENMASK(7, 0),
[CH_CHID] = GENMASK(7, 0),